{"product_id":"tens-nmes-rechargeable","title":"iStim EV-804 Rechargeable TENS\/EMS Combo Unit — 2 Channels, 24 Programs","description":"\u003ch1\u003eiStim EV-804 Rechargeable TENS and EMS Combination Unit\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eiStim EV-804\u003c\/strong\u003e is a rechargeable, dual-channel electrotherapy device combining TENS sensory stimulation and EMS muscle stimulation in one portable unit.\u003c\/p\u003e\n\u003cp\u003eUse the TENS programs when the goal is strong but comfortable sensory stimulation for temporary pain management support. Select EMS when the goal is a controlled muscle contraction using adjustable ramp, contraction, and relaxation settings.\u003c\/p\u003e\n\u003cp\u003eThe EV-804 includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTwo independently controlled output channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFive TENS modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo EMS modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e24 manufacturer-listed programs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable pulse rate and pulse width\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable EMS ramp, contraction, and relaxation timing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA backlit LCD screen\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable lithium-battery power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEight reusable 2 × 2-inch electrode pads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo lead-wire sets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUSB charging accessories\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe EV-804 is manufactured in Taiwan and is FDA 510(k) cleared for over-the-counter TENS and EMS use. \u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable TENS and EMS combination unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo independent channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports one or two electrode-pair placements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFive adjustable TENS modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo adjustable EMS modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e24 manufacturer-listed programs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSeparate intensity dial for each channel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable pulse rate from 2–150 Hz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable pulse width from 50–300 microseconds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEMS ramp adjustable from 1–8 seconds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEMS contraction time adjustable from 2–90 seconds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEMS relaxation time adjustable from 0–90 seconds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTreatment timer up to 60 minutes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBacklit digital display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEight reusable electrodes included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable lithium-battery design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUSB charging set included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOTC Class II medical device\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMade in Taiwan\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe manual for the EV-804 control platform lists the parameter ranges above. Because the EV-804 has existed in both disposable-battery and lithium-battery configurations.\u003c\/p\u003e\n\u003ch2\u003eQuick Product Summary\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eiStim EV-804\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice type\u003c\/td\u003e\n\u003ctd\u003ePortable TENS and EMS electrotherapy unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eEV-804\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalego SKU\u003c\/td\u003e\n\u003ctd\u003eEV-804\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003eTwo independent channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModalities\u003c\/td\u003e\n\u003ctd\u003eTENS and EMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS modes\u003c\/td\u003e\n\u003ctd\u003eBurst, Normal, Modulation, SD1, and SD2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMS modes\u003c\/td\u003e\n\u003ctd\u003eSynchronous and Alternate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer-listed programs\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse-rate range\u003c\/td\u003e\n\u003ctd\u003e2–150 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse-width range\u003c\/td\u003e\n\u003ctd\u003e50–300 µs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMS ramp\u003c\/td\u003e\n\u003ctd\u003e1–8 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMS on time\u003c\/td\u003e\n\u003ctd\u003e2–90 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMS off time\u003c\/td\u003e\n\u003ctd\u003e0–90 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment timer\u003c\/td\u003e\n\u003ctd\u003eUp to 60 minutes; continuous TENS may be available according to the current manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntensity\u003c\/td\u003e\n\u003ctd\u003eIndependently adjustable by channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eBacklit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eRechargeable lithium battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging\u003c\/td\u003e\n\u003ctd\u003eUSB charging cable and adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded electrodes\u003c\/td\u003e\n\u003ctd\u003eEight reusable 2 × 2-inch pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode connector\u003c\/td\u003e\n\u003ctd\u003eStandard 2 mm pin-style connection listed in the technical manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eTaiwan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFDA status\u003c\/td\u003e\n\u003ctd\u003e510(k) cleared, OTC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFDA clearance\u003c\/td\u003e\n\u003ctd\u003eK202317\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest fit\u003c\/td\u003e\n\u003ctd\u003eBuyers needing both sensory TENS and contraction-based EMS in one rechargeable unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eTENS and EMS in One Device\u003c\/h2\u003e\n\u003cp\u003eTENS and EMS both deliver electrical pulses through skin electrodes, but they are intended to produce different responses.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eTENS\u003c\/th\u003e\n\u003cth\u003eEMS \/ NMES\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull name\u003c\/td\u003e\n\u003ctd\u003eTranscutaneous electrical nerve stimulation\u003c\/td\u003e\n\u003ctd\u003eElectrical or neuromuscular muscle stimulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary target\u003c\/td\u003e\n\u003ctd\u003eSensory nerves\u003c\/td\u003e\n\u003ctd\u003eMotor nerves and muscle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended response\u003c\/td\u003e\n\u003ctd\u003eTingling, tapping, buzzing, or pulsing\u003c\/td\u003e\n\u003ctd\u003eVisible or palpable muscle contraction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary EV-804 role\u003c\/td\u003e\n\u003ctd\u003eTemporary pain-modulation support\u003c\/td\u003e\n\u003ctd\u003eHealthy-muscle stimulation and performance support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesired intensity\u003c\/td\u003e\n\u003ctd\u003eStrong but comfortable\u003c\/td\u003e\n\u003ctd\u003eStrong enough to produce a controlled, tolerable contraction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisible movement\u003c\/td\u003e\n\u003ctd\u003eUsually not\u003c\/td\u003e\n\u003ctd\u003eExpected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTiming controls\u003c\/td\u003e\n\u003ctd\u003eContinuous or modulated sensory patterns\u003c\/td\u003e\n\u003ctd\u003eRamp, contraction, and relaxation cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode placement\u003c\/td\u003e\n\u003ctd\u003eAround or near the treatment area\u003c\/td\u003e\n\u003ctd\u003eOver the target muscle and motor points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eRead \u003ca href=\"https:\/\/www.balego.com\/blogs\/which-modalities-to-use\/tens-vs-nmes\"\u003eTENS vs. NMES: Differences, Uses, and Device Selection\u003c\/a\u003e for a complete explanation.\u003c\/p\u003e\n\u003ch2\u003eFive TENS Modes\u003c\/h2\u003e\n\u003cp\u003eThe EV-804 provides five established TENS stimulation patterns.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTENS mode\u003c\/th\u003e\n\u003cth\u003eHow it operates\u003c\/th\u003e\n\u003cth\u003eGeneral sensation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNormal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDelivers continuous stimulation at the selected pulse rate and width\u003c\/td\u003e\n\u003ctd\u003eSteady tingling or tapping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBurst\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDelivers groups of pulses at rhythmic intervals\u003c\/td\u003e\n\u003ctd\u003eMore pronounced pulsing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAutomatically changes pulse rate and pulse width\u003c\/td\u003e\n\u003ctd\u003eChanging or wave-like sensation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSD1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModulates intensity and pulse width through a narrower strength-duration cycle\u003c\/td\u003e\n\u003ctd\u003eGradually changing stimulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSD2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUses a broader strength-duration modulation pattern\u003c\/td\u003e\n\u003ctd\u003eMore noticeable variation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe TENS modes are intended to provide different sensory experiences. No single mode is automatically best for every person, body area, or treatment goal.\u003c\/p\u003e\n\u003cp\u003eFor additional guidance, read \u003ca href=\"https:\/\/www.balego.com\/blogs\/tens-guides\/what-the-five-tens-modes-burst-normal-modulation-sd1-and-sd2-are-used-for\"\u003eWhat the Five TENS Modes Are Used For\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTwo EMS Modes\u003c\/h2\u003e\n\u003cp\u003eThe EV-804 adds two contraction-based muscle-stimulation modes.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEMS mode\u003c\/th\u003e\n\u003cth\u003eChannel behavior\u003c\/th\u003e\n\u003cth\u003ePractical use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSynchronous\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eChannels 1 and 2 contract at the same time\u003c\/td\u003e\n\u003ctd\u003eBilateral muscles or a larger muscle group requiring simultaneous contraction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlternate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eChannel 1 and Channel 2 contract in sequence\u003c\/td\u003e\n\u003ctd\u003ePaired muscles or reciprocal channel operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIn alternate mode, the technical instructions state that Channel 2 begins after the Channel 1 contraction is completed. The manual also specifies that the relaxation time should be at least as long as the contraction time in this mode.\u003c\/p\u003e\n\u003ch2\u003eAdjustable EMS Work-and-Rest Programming\u003c\/h2\u003e\n\u003cp\u003eA true EMS program needs more than intensity. The EV-804 allows the user or clinician to define how each contraction begins, how long it lasts, and how long the muscle rests.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEMS setting\u003c\/th\u003e\n\u003cth align=\"right\"\u003eEV-804 range\u003c\/th\u003e\n\u003cth\u003ePurpose\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRamp time\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1–8 seconds\u003c\/td\u003e\n\u003ctd\u003eGradually increases and decreases the contraction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn time\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e2–90 seconds\u003c\/td\u003e\n\u003ctd\u003eDetermines how long stimulation remains active\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff time\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e0–90 seconds\u003c\/td\u003e\n\u003ctd\u003eGives the muscle time to relax between contractions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse rate\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e2–150 Hz\u003c\/td\u003e\n\u003ctd\u003eInfluences contraction rhythm and smoothness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse width\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e50–300 µs\u003c\/td\u003e\n\u003ctd\u003eInfluences motor recruitment and perceived strength\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment time\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1–60 minutes\u003c\/td\u003e\n\u003ctd\u003eControls total session duration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe contraction time must be long enough to include both the ramp-up and ramp-down periods. NMES and EMS settings should be selected according to the target muscle, treatment goal, fatigue level, and professional instructions.\u003c\/p\u003e\n\u003ch2\u003eTwo Independent Channels\u003c\/h2\u003e\n\u003cp\u003eEach EV-804 channel has its own intensity control.\u003c\/p\u003e\n\u003cp\u003eThat allows the user to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eUse one electrode pair on a focused area\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse both channels with four electrodes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSet different intensity levels on the right and left sides\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSurround a larger area with two electrode pairs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStimulate two related muscles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse synchronous or alternating muscle contractions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe channels do not need to be set at identical intensity levels. Skin resistance, electrode condition, pad position, body contour, and individual sensitivity can cause one channel to feel stronger than the other.\u003c\/p\u003e\n\u003ch2\u003eRechargeable Lithium-Battery Power\u003c\/h2\u003e\n\u003cp\u003eThe current EV-804 is a rechargeable version supplied with USB charging accessories. FDA cleared the EV-804 as a lithium-battery-powered OTC TENS\/EMS\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRechargeable feature\u003c\/th\u003e\n\u003cth\u003ePractical benefit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in lithium battery\u003c\/td\u003e\n\u003ctd\u003eEliminates regular disposable 9V battery purchases\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB charging\u003c\/td\u003e\n\u003ctd\u003eConvenient charging between sessions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePortable construction\u003c\/td\u003e\n\u003ctd\u003eUseful for home, clinic, training-room, or travel storage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklit screen\u003c\/td\u003e\n\u003ctd\u003eSettings remain visible in lower-light conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-battery indication\u003c\/td\u003e\n\u003ctd\u003eHelps users recognize when charging is required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe EV-804 is \u003cstrong\u003erechargeable, but not wireless\u003c\/strong\u003e. Lead wires are still required between the device and electrode pads.\u003c\/p\u003e\n\u003cp\u003eDo not operate the device while it is connected to charging equipment unless the current included manual explicitly permits it.\u003c\/p\u003e\n\u003ch2\u003eWhat Comes in the Box?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded item\u003c\/th\u003e\n\u003cth align=\"right\"\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eiStim EV-804 rechargeable TENS\/EMS unit\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReusable 2 × 2-inch electrodes\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDual-electrode lead wires\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB charger and charging cable\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1 set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstruction manual\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuick-start or electrode-placement guides\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eIncluded according to current package configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eElectrode Size Selection\u003c\/h2\u003e\n\u003cp\u003eThe included 2 × 2-inch electrodes are a general-purpose size. Other compatible sizes may be useful for different body areas.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrode size\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003cth\u003eCommon practical fit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.25-inch round\u003c\/td\u003e\n\u003ctd\u003eSmall\u003c\/td\u003e\n\u003ctd\u003eHands, feet, or compact placement areas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2-inch round\u003c\/td\u003e\n\u003ctd\u003eFocused\u003c\/td\u003e\n\u003ctd\u003eCurved joints and smaller muscles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2-inch square\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eGeneral TENS and EMS placement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 × 3.5-inch rectangle\u003c\/td\u003e\n\u003ctd\u003eMedium to broad\u003c\/td\u003e\n\u003ctd\u003eQuadriceps, hamstrings, shoulder, or lumbar muscles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.75-inch round\u003c\/td\u003e\n\u003ctd\u003eBroad and rounded\u003c\/td\u003e\n\u003ctd\u003eLarger curved body areas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eLarger electrodes spread current across a broader surface. Smaller electrodes concentrate the current over less skin and may feel stronger at the same device setting.\u003c\/p\u003e\n\u003ch2\u003eHow to Set Up the EV-804\u003c\/h2\u003e\n\u003ch3\u003e1. Charge the device\u003c\/h3\u003e\n\u003cp\u003eCharge the unit using the supplied cable and charger before the initial session.\u003c\/p\u003e\n\u003ch3\u003e2. Turn both channel controls off\u003c\/h3\u003e\n\u003cp\u003eRotate both intensity dials fully down before connecting the lead wires or applying the electrodes.\u003c\/p\u003e\n\u003ch3\u003e3. Connect the lead wires\u003c\/h3\u003e\n\u003cp\u003eInsert the lead wires securely into the Channel 1 and Channel 2 output ports.\u003c\/p\u003e\n\u003ch3\u003e4. Attach the electrodes\u003c\/h3\u003e\n\u003cp\u003eConnect each pad to the lead-wire pin before placing it on the skin.\u003c\/p\u003e\n\u003ch3\u003e5. Prepare the skin\u003c\/h3\u003e\n\u003cp\u003eApply the electrodes to clean, dry, intact skin. Remove lotion, oil, perspiration, and dirt that could reduce adhesion or create uneven stimulation.\u003c\/p\u003e\n\u003ch3\u003e6. Position the electrodes\u003c\/h3\u003e\n\u003cp\u003eFor TENS, pads are generally placed around or near the intended treatment area.\u003c\/p\u003e\n\u003cp\u003eFor EMS, pads are generally positioned over the muscle belly and motor-point region so that stimulation produces the desired contraction.\u003c\/p\u003e\n\u003ch3\u003e7. Select TENS or EMS\u003c\/h3\u003e\n\u003cp\u003eChoose the modality and program that match the intended goal.\u003c\/p\u003e\n\u003ch3\u003e8. Adjust the available parameters\u003c\/h3\u003e\n\u003cp\u003eDepending on the selected mode, adjust the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePulse rate\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePulse width\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRamp time\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOn time\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOff time\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTreatment timer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e9. Increase each channel gradually\u003c\/h3\u003e\n\u003cp\u003eRaise Channel 1 until the stimulation reaches the desired comfortable level. Repeat for Channel 2 when it is being used.\u003c\/p\u003e\n\u003ch3\u003e10. Monitor the session\u003c\/h3\u003e\n\u003cp\u003eReduce or stop stimulation for sharpness, burning, pain, an uncontrolled contraction, or worsening symptoms.\u003c\/p\u003e\n\u003ch3\u003e11. Turn intensity down before removing pads\u003c\/h3\u003e\n\u003cp\u003eReturn both channel controls to zero and switch the device off before disconnecting or removing the electrodes.\u003c\/p\u003e\n\u003ch2\u003eWhat Should TENS Feel Like?\u003c\/h2\u003e\n\u003cp\u003eTENS generally produces the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTingling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTapping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuzzing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRhythmic pulsing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA changing sensation during modulation modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe intensity should be strong and clearly noticeable but comfortable. Conventional TENS usually should not produce a forceful muscle contraction.\u003c\/p\u003e\n\u003ch2\u003eWhat Should EMS Feel Like?\u003c\/h2\u003e\n\u003cp\u003eEMS normally begins with tingling and increases until the target muscle contracts.\u003c\/p\u003e\n\u003cp\u003eA properly adjusted EMS cycle may feel like\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eStimulation rises gradually during the ramp.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe target muscle tightens.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe contraction remains active for the selected time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe output declines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe muscle rests during the off time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe cycle repeats.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe contraction should be controlled and tolerable. It should not feel sharp, burning, or painful.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eEV-804 vs. Separate Balego TENS and NMES Units\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eiStim EV-804\u003c\/th\u003e\n\u003cth\u003e\n\u003ca href=\"https:\/\/www.balego.com\/products\/balego-tens-digital-edition-unit-with-100ma-output-and-5-modes\"\u003eBalego TENS Digital Edition\u003c\/a\u003e + \u003ca href=\"https:\/\/www.balego.com\/products\/nmes-muscle-stimulator\"\u003eBalego EMS Digital\u003c\/a\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of devices\u003c\/td\u003e\n\u003ctd\u003eOne\u003c\/td\u003e\n\u003ctd\u003eTwo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eDedicated device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMS\/NMES\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eDedicated device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRechargeable\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo, each Balego device uses a replaceable 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel availability\u003c\/td\u003e\n\u003ctd\u003eTwo shared channels\u003c\/td\u003e\n\u003ctd\u003eTwo channels on each device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgramming\u003c\/td\u003e\n\u003ctd\u003eCombined interface\u003c\/td\u003e\n\u003ctd\u003eSeparate modality-specific controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded electrodes\u003c\/td\u003e\n\u003ctd\u003eEight\u003c\/td\u003e\n\u003ctd\u003eFour with each unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest fit\u003c\/td\u003e\n\u003ctd\u003eBuyer wanting one rechargeable combination unit\u003c\/td\u003e\n\u003ctd\u003eClinic or user wanting separate dedicated devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eDedicated units may be simpler when only one modality is used at a time. The EV-804 reduces the number of devices and power systems required.\u003c\/p\u003e\n\u003ch2\u003eWho Should Consider the EV-804?\u003c\/h2\u003e\n\u003cp\u003eThe EV-804 may be a good fit for buyers who want the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTENS and EMS in one device\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable battery power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo independently controlled channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFamiliar Burst, Normal, Modulation, SD1, and SD2 TENS modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSynchronous and alternating muscle stimulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable EMS ramp and work-rest cycles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEight starter electrodes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA backlit display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eManual control over pulse rate and pulse width\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAn over-the-counter electrotherapy device\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA unit made by an established Taiwanese medical-device manufacturer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eConsider Another Device When:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOnly TENS is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOnly NMES or EMS is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFour independent channels are needed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInterferential or Russian stimulation is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompliance tracking is essential.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBody-part presets are preferred.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA lead-wire-free wearable device is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProfessional ultrasound or clinic-based electrotherapy is needed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse our complete \u003ca href=\"https:\/\/www.balego.com\/collections\/tens\"\u003eTENS collection\u003c\/a\u003e, \u003ca href=\"https:\/\/www.balego.com\/collections\/neuromuscular-stimulation\"\u003eneuromuscular stimulation devices\u003c\/a\u003e, and \u003ca href=\"https:\/\/www.balego.com\/collections\/electrotherapy-electrodes\"\u003eelectrotherapy electrodes\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFDA-Cleared Intended Use\u003c\/h2\u003e\n\u003cp\u003eFDA cleared the lithium-powered EV-804 as an OTC TENS\/EMS combination device.\u003c\/p\u003e\n\u003ch3\u003eTENS intended use\u003c\/h3\u003e\n\u003cp\u003eThe TENS function is intended for temporary relief of pain associated with sore and aching muscles in the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eThe low back\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe arms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe legs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe cleared labeling ties these symptoms to strain from exercise or normal household and work activities.\u003c\/p\u003e\n\u003ch3\u003eEMS intended use\u003c\/h3\u003e\n\u003cp\u003eThe EMS function is intended to stimulate healthy muscles to improve or facilitate muscle performance.\u003c\/p\u003e\n\u003cp\u003eThe product page should not claim that the EV-804:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCures chronic pain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTreats arthritis itself\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeals injuries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRepairs damaged muscles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrevents blood clots\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReverses nerve damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplaces physical therapy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduces permanent pain relief\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSafety Information\u003c\/h2\u003e\n\u003cp\u003eDo not use the EV-804 with a pacemaker, implanted defibrillator, or other implanted electronic device unless specifically cleared by the appropriate physician and device manufacturer.\u003c\/p\u003e\n\u003cp\u003eDo not place electrodes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAcross the chest\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThrough the head\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver the eyes or mouth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOn the front or sides of the neck\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver the carotid sinus\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver open wounds or broken skin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver infected or significantly irritated skin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIn another location prohibited by the instruction manual\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eObtain medical guidance before use in the presence of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePregnancy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEpilepsy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeart disease\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRecent surgery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImpaired sensation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePoor circulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUndiagnosed or changing pain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnother significant medical condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not use electrical stimulation while driving, operating machinery, bathing, or performing an activity in which an unexpected sensation or muscle contraction could cause injury. \u003c\/p\u003e\n\u003ch2\u003eElectrode Care\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCare step\u003c\/th\u003e\n\u003cth\u003eWhy it matters\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApply to clean, dry skin\u003c\/td\u003e\n\u003ctd\u003eImproves adhesion and current distribution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvoid touching the hydrogel\u003c\/td\u003e\n\u003ctd\u003eHelps preserve pad tack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemove by lifting the pad edge\u003c\/td\u003e\n\u003ctd\u003eProtects the pigtail and wire connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReturn pads to their liners\u003c\/td\u003e\n\u003ctd\u003eSlows hydrogel drying\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStore in a sealed package\u003c\/td\u003e\n\u003ctd\u003eProtects pads between treatments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeep away from excessive heat\u003c\/td\u003e\n\u003ctd\u003eHelps preserve electrode materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDo not share pads\u003c\/td\u003e\n\u003ctd\u003eSupports hygiene and single-patient use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplace dry or damaged pads\u003c\/td\u003e\n\u003ctd\u003eReduces sharp or uneven stimulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProblem\u003c\/th\u003e\n\u003cth\u003ePossible cause\u003c\/th\u003e\n\u003cth\u003eSuggested response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo stimulation\u003c\/td\u003e\n\u003ctd\u003eIntensity is at zero or connection is incomplete\u003c\/td\u003e\n\u003ctd\u003eCheck channel control, leads, and pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOne channel does not work\u003c\/td\u003e\n\u003ctd\u003eLoose or damaged lead wire\u003c\/td\u003e\n\u003ctd\u003eReconnect or test another compatible lead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeak stimulation\u003c\/td\u003e\n\u003ctd\u003eLow battery or poor pad contact\u003c\/td\u003e\n\u003ctd\u003eRecharge the device and inspect the pads.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSharp feeling\u003c\/td\u003e\n\u003ctd\u003eDry hydrogel or lifted pad edge\u003c\/td\u003e\n\u003ctd\u003eTurn off and replace or reposition the pad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePads will not stick\u003c\/td\u003e\n\u003ctd\u003eOily skin or worn hydrogel\u003c\/td\u003e\n\u003ctd\u003eClean the skin or replace the electrodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOne side feels stronger\u003c\/td\u003e\n\u003ctd\u003eDifferent skin resistance or placement\u003c\/td\u003e\n\u003ctd\u003eAdjust the channels independently\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWrong muscle contracts\u003c\/td\u003e\n\u003ctd\u003eElectrode placement is not targeting the intended motor point\u003c\/td\u003e\n\u003ctd\u003eTurn off and reposition the pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMuscle fatigues quickly\u003c\/td\u003e\n\u003ctd\u003eIntensity, on-time, or rest time may be unsuitable\u003c\/td\u003e\n\u003ctd\u003eStop and review the EMS program\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSkin remains irritated\u003c\/td\u003e\n\u003ctd\u003eSensitivity, excessive output, or worn electrodes\u003c\/td\u003e\n\u003ctd\u003eStop use and obtain professional guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe device does not charge\u003c\/td\u003e\n\u003ctd\u003eDamaged cable, charger, or battery\u003c\/td\u003e\n\u003ctd\u003eDiscontinue damaged accessories and contact support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the iStim EV-804 a TENS unit or an EMS unit?\u003c\/h3\u003e\n\u003cp\u003eIt is both. The device combines five TENS modes with two EMS muscle-stimulation modes.\u003c\/p\u003e\n\u003ch3\u003eIs EMS the same as NMES?\u003c\/h3\u003e\n\u003cp\u003eThe terms are frequently used interchangeably. NMES is the more common clinical term, while EMS is a broader abbreviation for electrical muscle stimulation.\u003c\/p\u003e\n\u003ch3\u003eIs the EV-804 rechargeable?\u003c\/h3\u003e\n\u003cp\u003eYes. The current EV-804 is marketed as a lithium-battery-powered rechargeable device and includes USB charging accessories.\u003c\/p\u003e\n\u003ch3\u003eIs the EV-804 wireless?\u003c\/h3\u003e\n\u003cp\u003eNo. It is rechargeable and portable, but lead wires connect the device to the electrode pads.\u003c\/p\u003e\n\u003ch3\u003eHow many channels does it have?\u003c\/h3\u003e\n\u003cp\u003eIt has two independently adjustable channels.\u003c\/p\u003e\n\u003ch3\u003eHow many electrodes can be used at once?\u003c\/h3\u003e\n\u003cp\u003eA standard dual-channel setup uses four electrodes. Eight pads are included, providing an additional set.\u003c\/p\u003e\n\u003ch3\u003eWhat TENS modes are included?\u003c\/h3\u003e\n\u003cp\u003eBurst, Normal, Modulation, SD1, and SD2.\u003c\/p\u003e\n\u003ch3\u003eWhat EMS modes are included?\u003c\/h3\u003e\n\u003cp\u003eSynchronous and Alternate.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between synchronous and alternate EMS?\u003c\/h3\u003e\n\u003cp\u003eSynchronous mode activates both channels together. Alternate mode activates one channel and then the other.\u003c\/p\u003e\n\u003ch3\u003eDoes it have adjustable EMS settings?\u003c\/h3\u003e\n\u003cp\u003eYes. The EV-804 control platform permits adjustment of pulse rate, pulse width, ramp time, contraction time, relaxation time, and treatment time.\u003c\/p\u003e\n\u003ch3\u003eWhat is the pulse-rate range?\u003c\/h3\u003e\n\u003cp\u003eThe accessible technical manual lists 2–150 Hz.\u003c\/p\u003e\n\u003ch3\u003eWhat is the pulse-width range?\u003c\/h3\u003e\n\u003cp\u003eThe technical manual lists 50–300 microseconds.\u003c\/p\u003e\n\u003ch3\u003eHow long can the timer be set?\u003c\/h3\u003e\n\u003cp\u003eThe manual lists treatment times up to 60 minutes, with continuous operation available in certain TENS settings. Verify the current rechargeable model’s enclosed instructions.\u003c\/p\u003e\n\u003ch3\u003eHow many programs does it include?\u003c\/h3\u003e\n\u003cp\u003eThis unit is rechargeable with 24 programs across seven TENS and EMS modes. The included manual should be used to identify the exact current program structure.\u003c\/p\u003e\n\u003ch3\u003eWhere is the EV-804 made?\u003c\/h3\u003e\n\u003cp\u003eIt is made in Taiwan.\u003c\/p\u003e\n\u003ch3\u003eIs the EV-804 FDA approved?\u003c\/h3\u003e\n\u003cp\u003eThe accurate regulatory term is \u003cstrong\u003eFDA 510(k) cleared\u003c\/strong\u003e, not FDA approved. It was cleared under K202317.\u003c\/p\u003e\n\u003ch3\u003eCan TENS and EMS be used at the same time?\u003c\/h3\u003e\n\u003cp\u003eThe modalities are selected separately. Do not assume that the EV-804 delivers TENS and EMS simultaneously unless the current manual expressly describes such operation.\u003c\/p\u003e\n\u003ch3\u003eCan the EV-804 build muscle?\u003c\/h3\u003e\n\u003cp\u003eEMS can stimulate healthy muscles and may support muscle-performance programs, but electrical stimulation should not be marketed as a complete substitute for voluntary exercise or rehabilitation.\u003c\/p\u003e\n\u003ch2\u003eFinal Product Summary\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eiStim EV-804 Rechargeable TENS\/EMS Combination Unit\u003c\/strong\u003e is a practical choice for users who need both:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSensory-level TENS stimulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContraction-based EMS muscle stimulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts main advantages are the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTwo independent channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSeven stimulation modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e24 manufacturer-listed programs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable lithium-battery power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable TENS and EMS parameters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA backlit display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEight included electrode pads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUSB charging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFDA 510(k)-cleared OTC status\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iStim","offers":[{"title":"Default Title","offer_id":48841324200191,"sku":"EV-804","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/0570\/5983\/files\/TENS_EMS_EV-804_Rechargeable.webp?v=1784174234","url":"https:\/\/balego-stores.myshopify.com\/products\/tens-nmes-rechargeable","provider":"Balego","version":"1.0","type":"link"}