{"product_id":"wireless-tens-unit-menstrual-relief","title":"S1 Wireless TENS Unit with Heat for Menstrual Cramps","description":"\u003ch2\u003eiStim S1 Wireless TENS Unit with Heat for Menstrual Relief\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eiStim S1 Wireless TENS Unit\u003c\/strong\u003e is a slim, rechargeable device that combines transcutaneous electrical nerve stimulation with localized heat and fits the lower abdomen or another treatment area. Its flexible wings attach directly to proprietary self-adhesive gel pads, eliminating the separate lead wires found on a conventional TENS machine.\u003c\/p\u003e\n\u003cp\u003eThe S1 provides a fixed 100 Hz TENS program with \u003cstrong\u003e15 adjustable intensity levels\u003c\/strong\u003e. Heat can be used with the electrical stimulation or turned off when TENS alone is preferred. Each treatment automatically ends after approximately 20 minutes. The device can also be used on appropriate areas of the back, waist, shoulders, arms, and legs for its other FDA-cleared pain-relief indications. \u003c\/p\u003e\n\u003ch3\u003eProduct highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWearable TENS and heat in one device\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned specifically for menstrual-cramp and general pain applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e15 adjustable TENS intensity levels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFixed 100 Hz pulse frequency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeat up to approximately 110°F\/43°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTENS with heat or TENS without heat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlexible silicone-wing design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo external electrode lead wires\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRechargeable lithium-ion battery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUSB-C charging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatic 20-minute shutoff\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContact-detection safety feature\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProprietary Japanese-gel electrode pads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver-the-counter 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 FDA-cleared FT-615 platform is intended for temporary relief of pain associated with dysmenorrhea when used with OTC pain medication. It is also indicated for symptomatic management of chronic pain, temporary relief of sore muscles associated with exercise or normal activities, and temporary relief of minor aches through superficial heat.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eiStim S1 specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eiStim S1\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eWearable TENS unit with heat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eiStim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eS1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnderlying device model\u003c\/td\u003e\n\u003ctd\u003eFT-615\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalego SKU\u003c\/td\u003e\n\u003ctd\u003eS1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFDA clearance\u003c\/td\u003e\n\u003ctd\u003eK232675\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegulatory class\u003c\/td\u003e\n\u003ctd\u003eClass II, over-the-counter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS programs\u003c\/td\u003e\n\u003ctd\u003eOne fixed program\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse frequency\u003c\/td\u003e\n\u003ctd\u003e100 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS intensity\u003c\/td\u003e\n\u003ctd\u003e15 selectable levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat\u003c\/td\u003e\n\u003ctd\u003eSelectable on or off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum listed temperature\u003c\/td\u003e\n\u003ctd\u003eApproximately 110°F\/43°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment timer\u003c\/td\u003e\n\u003ctd\u003eApproximately 20 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eRechargeable lithium-ion battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging connection\u003c\/td\u003e\n\u003ctd\u003eUSB-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice controls\u003c\/td\u003e\n\u003ctd\u003ePower\/Mode, Intensity Up, Intensity Down\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode style\u003c\/td\u003e\n\u003ctd\u003eProprietary direct-attachment gel pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFDA-listed pad dimensions\u003c\/td\u003e\n\u003ctd\u003e50 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate device dimensions\u003c\/td\u003e\n\u003ctd\u003e170 × 77 mm\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\u003ePrimary application\u003c\/td\u003e\n\u003ctd\u003eTemporary menstrual-cramp pain relief as labeled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther labeled regions\u003c\/td\u003e\n\u003ctd\u003eShoulder, waist, back, neck, arms, and legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch1\u003eHow is the S1 different from a standard TENS unit?\u003c\/h1\u003e\n\u003cp\u003eA conventional TENS machine usually has a handheld controller, two lead wires, and two or four separate electrodes. The S1 integrates the controls and heating element into its flexible treatment surface.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eiStim S1\u003c\/th\u003e\n\u003cth\u003eConventional TENS unit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eController\u003c\/td\u003e\n\u003ctd\u003eIntegrated into the wearable pad\u003c\/td\u003e\n\u003ctd\u003eSeparate handheld unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLead wires\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eUsually two lead wires\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode arrangement\u003c\/td\u003e\n\u003ctd\u003eTwo proprietary pads attached to the device\u003c\/td\u003e\n\u003ctd\u003eTwo or four individually placed pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat\u003c\/td\u003e\n\u003ctd\u003eBuilt in\u003c\/td\u003e\n\u003ctd\u003eUsually not included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgram selection\u003c\/td\u003e\n\u003ctd\u003eOne 100 Hz TENS program\u003c\/td\u003e\n\u003ctd\u003eOften several modes and adjustable parameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntensity\u003c\/td\u003e\n\u003ctd\u003e15 levels\u003c\/td\u003e\n\u003ctd\u003eProduct-dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlacement flexibility\u003c\/td\u003e\n\u003ctd\u003eOne broad treatment zone\u003c\/td\u003e\n\u003ctd\u003eElectrodes can be spaced individually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePortability\u003c\/td\u003e\n\u003ctd\u003eSlim, wearable design\u003c\/td\u003e\n\u003ctd\u003eThe controller may be clipped to clothing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest fit\u003c\/td\u003e\n\u003ctd\u003eSimple menstrual-cramp and broad-area treatment\u003c\/td\u003e\n\u003ctd\u003eMore customizable multi-pad pain treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe S1 is better suited to someone who values simplicity, warmth, and freedom from lead wires. A conventional device may be preferable for users who need several electrode-placement patterns, longer sessions, multiple TENS modes, or independent channels.\u003c\/p\u003e\n\u003cp\u003eExplore more options in our \u003ca href=\"https:\/\/www.balego.com\/collections\/tens\"\u003eTENS units collection\u003c\/a\u003e or visit the \u003ca href=\"https:\/\/www.balego.com\/blogs\/tens-guides\"\u003eTENS education and device guide library\u003c\/a\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eHow does TENS support menstrual-cramp relief?\u003c\/h1\u003e\n\u003cp\u003eTENS delivers electrical pulses through electrodes attached to the skin. These pulses stimulate sensory nerves in the treatment area and may alter the way pain signals are transmitted and perceived. The sensation should feel strong and distinct but comfortable—not painful or burning.\u003c\/p\u003e\n\u003cp\u003eA 2024 Cochrane review assessed TENS for primary dysmenorrhea using evidence current through April 2024. The review found that both high- and low-frequency TENS appeared to reduce period pain compared with placebo or no treatment, although effectiveness varies and TENS does not diagnose or correct an underlying gynecologic condition. \u003c\/p\u003e\n\u003cp\u003eThe S1 uses a high-frequency 100 Hz output, matching the menstrual-relief pulse frequency described in its product documentation. \u003c\/p\u003e\n\u003ch2\u003eWhat does the heat function do?\u003c\/h2\u003e\n\u003cp\u003eThe heating surface provides localized warmth up to approximately 110°F\/43°C. Heat can be used with TENS or turned off so that only electrical stimulation remains active.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating selection\u003c\/th\u003e\n\u003cth align=\"right\"\u003eTENS\u003c\/th\u003e\n\u003cth align=\"right\"\u003eHeat\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS plus heat\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eYes\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS only\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eYes\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat during startup\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eThe device begins heating when switched on\u003c\/td\u003e\n\u003ctd align=\"right\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eHeat should feel comfortably warm. Turn the device off if it becomes excessively hot, painful, or irritating.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWhat is the S1 intended to relieve?\u003c\/h1\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFDA-cleared use\u003c\/th\u003e\n\u003cth\u003eProduct-page wording\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDysmenorrhea\u003c\/td\u003e\n\u003ctd\u003eTemporary relief of pain associated with menstrual cramps when used with OTC pain medication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChronic pain\u003c\/td\u003e\n\u003ctd\u003eSymptomatic relief and management of chronic pain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSore or aching muscles\u003c\/td\u003e\n\u003ctd\u003eTemporary relief after exercise or ordinary household activity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinor aches and pains\u003c\/td\u003e\n\u003ctd\u003eTemporary relief through the heat function\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody regions\u003c\/td\u003e\n\u003ctd\u003eShoulder, waist, back, neck, arms, and legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe product should not be described as treating endometriosis, fibroids, ovarian cysts, pelvic inflammatory disease, or another underlying cause of painful periods. It provides temporary symptomatic relief.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003ePrimary vs. secondary menstrual cramps\u003c\/h1\u003e\n\u003cp\u003eNot all menstrual pain has the same cause.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003cth\u003eGeneral description\u003c\/th\u003e\n\u003cth\u003eWhy evaluation matters\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary dysmenorrhea\u003c\/td\u003e\n\u003ctd\u003eMenstrual cramping without an identifiable pelvic disorder\u003c\/td\u003e\n\u003ctd\u003eTENS may be considered as part of symptom management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary dysmenorrhea\u003c\/td\u003e\n\u003ctd\u003eMenstrual pain associated with an underlying condition\u003c\/td\u003e\n\u003ctd\u003eThe underlying cause may require medical treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eMedical evaluation is particularly important when pain begins after years of relatively comfortable periods, becomes progressively worse, occurs outside menstruation, accompanies very heavy bleeding, causes fainting, follows a positive pregnancy test, or interferes substantially with daily life. ACOG advises that you seek care when period pain is severe, worse than usual, or repeatedly disrupts normal activities.\u003c\/p\u003e\n\u003cp\u003eFor related education, visit the \u003ca href=\"https:\/\/www.balego.com\/blogs\/tens-protocols-settings\"\u003eTENS protocols and electrode-placement library\u003c\/a\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWhat comes with the iStim S1?\u003c\/h1\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity or description\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eiStim S1 TENS and heat unit\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProprietary self-adhesive gel pads\u003c\/td\u003e\n\u003ctd\u003eConfirm current Balego carton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB-C charging cable\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode parking boards\u003c\/td\u003e\n\u003ctd\u003eVerify carton; online instructions show 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuick-start guide\u003c\/td\u003e\n\u003ctd\u003eVerify carton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstruction manual\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe current iStim page lists the S1, two self-adhesive gel pads, a USB-C cable, and an instruction manual. A separate online manual summary describes two packs containing eight pad pieces, two parking boards, and a quick guide. Balego should inspect current inventory before publishing a precise pad count. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eHow to use the S1\u003c\/h1\u003e\n\u003cp\u003eAlways read the instructions supplied with the Balego product before the first treatment.\u003c\/p\u003e\n\u003ch2\u003e1. Charge the device\u003c\/h2\u003e\n\u003cp\u003eCharge the S1 for at least two hours before initial use with the supplied USB-C equipment. The available instructions caution against using a quick charger. Disconnect the device from the charger before applying it to the body. \u003c\/p\u003e\n\u003ch2\u003e2. Prepare the treatment area\u003c\/h2\u003e\n\u003cp\u003eApply the S1 only to normal, healthy, clean, and dry skin.\u003c\/p\u003e\n\u003cp\u003eRemove:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLotion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBody oil\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSweat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMakeup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTopical pain cream\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdditional conductive gel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOils and lotions can reduce electrode adhesion and produce uneven stimulation.\u003c\/p\u003e\n\u003ch2\u003e3. Attach the proprietary pads\u003c\/h2\u003e\n\u003cp\u003eEach pad has a side intended for attachment to the device and another side intended for skin contact.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eRemove the film marked \u003cstrong\u003eDevice Side\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlign the exposed gel surface with the corresponding conductive area on the S1.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePress it down evenly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemove the skin-side protective film.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetain the storage film or parking board.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eDo not add electrode gel. The manufacturer specifically instructs users not to apply extra gel to the S1 pads. \u003c\/p\u003e\n\u003ch2\u003e4. Position the device\u003c\/h2\u003e\n\u003cp\u003eApply the complete S1 horizontally over the appropriate lower-abdominal treatment area or another region permitted by its instructions. Press both wings evenly against the skin.\u003c\/p\u003e\n\u003cp\u003eThe entire gel surface should remain in contact. Lifted corners can concentrate stimulation and trigger the contact-detection system.\u003c\/p\u003e\n\u003ch2\u003e5. Turn on the S1\u003c\/h2\u003e\n\u003cp\u003ePress and hold the Power\/Mode button for approximately three seconds.\u003c\/p\u003e\n\u003cp\u003eThe heat indicator begins flashing green, and the heating function starts. If the device does not detect sufficient skin contact, it may beep and switch itself off. \u003c\/p\u003e\n\u003ch2\u003e6. Activate and adjust TENS\u003c\/h2\u003e\n\u003cp\u003ePress the Power\/Mode button briefly until the TENS indicator flashes. Use the plus and minus buttons to adjust the electrical intensity.\u003c\/p\u003e\n\u003cp\u003eBegin at the lowest level and increase one step at a time. The desired sensation is strong but comfortable tingling or pulsing.\u003c\/p\u003e\n\u003ch2\u003e7. Turn off heat when desired\u003c\/h2\u003e\n\u003cp\u003ePress the Power\/Mode button briefly again to turn off heat while continuing TENS. The product does not require heat to deliver electrical stimulation.\u003c\/p\u003e\n\u003ch2\u003e8. Complete the treatment\u003c\/h2\u003e\n\u003cp\u003eThe S1 automatically shuts off after approximately 20 minutes. To stop early, press and hold the Power\/Mode button for three seconds. \u003c\/p\u003e\n\u003ch2\u003e9. Remove and store\u003c\/h2\u003e\n\u003cp\u003eTurn off the device before lifting it from the skin. Remove it slowly to avoid damaging the gel.\u003c\/p\u003e\n\u003cp\u003eReturn the pads to their storage boards and keep them in a cool, dry place.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWhere should the S1 be placed for menstrual cramps?\u003c\/h1\u003e\n\u003cp\u003eThe product is designed to conform to the lower abdominal area. Apply it only to intact skin and follow the placement illustration included with the device.\u003c\/p\u003e\n\u003cp\u003eDo not place it\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\u003eOver the heart\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOn the front or side of the neck\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver the head\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDirectly over the mouth or throat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver broken, infected, inflamed, or numb skin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver genital tissue\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIn a position where the device bridges the front and back of the torso\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSome people perceive period-related discomfort primarily in the lower back. The FT-615 clearance also includes appropriate back and waist applications, but placement should still follow the enclosed instructions.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eProprietary S1 gel pads\u003c\/h1\u003e\n\u003cp\u003eThe S1 does not accept ordinary pin-style TENS electrodes. Its pads attach directly to the conductive areas on the wearable unit.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrode feature\u003c\/th\u003e\n\u003cth\u003eS1 requirement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePad type\u003c\/td\u003e\n\u003ctd\u003eProprietary double-sided gel electrode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFDA-listed dimensions\u003c\/td\u003e\n\u003ctd\u003e50 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eDirect attachment to the S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard 2 mm pin pads\u003c\/td\u003e\n\u003ctd\u003eNot compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtra electrode gel\u003c\/td\u003e\n\u003ctd\u003eDo not use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement point\u003c\/td\u003e\n\u003ctd\u003eWhen adhesion or comfort declines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eReapply to supplied parking board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFDA documentation warns that worn pads can create incomplete contact and higher current density in smaller areas, increasing the possibility of skin irritation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eGel-pad care\u003c\/h1\u003e\n\u003cp\u003eAfter every treatment:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eTurn the S1 off.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemove it carefully from the skin.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplace the clear film or parking board.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeep the gel away from hair, lint, dust, oil, and lotion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStore it in a cool, dry location.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not immerse or wash the complete device.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not use alcohol, solvent, or abrasive cleaners.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not add conductive gel or water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eReplace a pad when it is dirty, damaged, dried out, or unable to hold the entire device securely against the skin. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eSafety information\u003c\/h1\u003e\n\u003cp\u003eDo not use the S1 with a pacemaker, implanted defibrillator, or another implanted electronic device. The available instructions also advise against use over broken skin or while driving or operating machinery. \u003c\/p\u003e\n\u003cp\u003eDo not use the device:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDuring pregnancy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAcross the chest or through the thorax\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver the front or side of the neck\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver an area with reduced skin sensation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver a suspected blood clot\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver actively infected or inflamed skin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIn a bath, shower, or other wet environment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhile sleeping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhile connected to a charger\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAt the same time as another electrical-stimulation device\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNear operating shortwave or microwave therapy equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConsult an appropriate healthcare professional before use when there is a heart condition, seizure disorder, impaired sensation, circulation disorder, unexplained pelvic pain, recent abdominal surgery, or uncertainty about the cause of menstrual pain.\u003c\/p\u003e\n\u003cp\u003eStop treatment if any of the following apply:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBurning or sharp pain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExcessive heat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDizziness or nausea beyond usual menstrual symptoms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePersistent redness\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBlistering\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSkin swelling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUnexpected bleeding\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWorsening pelvic pain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eTroubleshooting guide\u003c\/h1\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProblem\u003c\/th\u003e\n\u003cth\u003eLikely cause\u003c\/th\u003e\n\u003cth\u003eRecommended action\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe device does not turn on\u003c\/td\u003e\n\u003ctd\u003eThe battery is depleted\u003c\/td\u003e\n\u003ctd\u003eCharge for at least two hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS1 turns off immediately\u003c\/td\u003e\n\u003ctd\u003eIncomplete skin contact\u003c\/td\u003e\n\u003ctd\u003ePress both pads evenly onto clean, dry skin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe device beeps\u003c\/td\u003e\n\u003ctd\u003eA pad is loose or contact is insufficient\u003c\/td\u003e\n\u003ctd\u003eReposition the S1 or replace worn pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe heat indicator flashes red\u003c\/td\u003e\n\u003ctd\u003eThe battery needs charging\u003c\/td\u003e\n\u003ctd\u003eTurn the unit off and recharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo TENS sensation\u003c\/td\u003e\n\u003ctd\u003eIntensity is too low\u003c\/td\u003e\n\u003ctd\u003eIncrease gradually using the plus button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStill no stimulation\u003c\/td\u003e\n\u003ctd\u003ePoor pad adhesion\u003c\/td\u003e\n\u003ctd\u003eCheck both gel pads and skin preparation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensation feels sharp\u003c\/td\u003e\n\u003ctd\u003eThe pad is lifting or contaminated\u003c\/td\u003e\n\u003ctd\u003eTurn off, remove, and inspect the pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe sensation is too strong\u003c\/td\u003e\n\u003ctd\u003eIntensity is too high\u003c\/td\u003e\n\u003ctd\u003eReduce the setting immediately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat feels excessive\u003c\/td\u003e\n\u003ctd\u003eHeat is not tolerated\u003c\/td\u003e\n\u003ctd\u003eTurn the heat function off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe unit shuts off after 20 minutes\u003c\/td\u003e\n\u003ctd\u003eNormal timer operation\u003c\/td\u003e\n\u003ctd\u003eThe treatment cycle is complete\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGel pads will not stick\u003c\/td\u003e\n\u003ctd\u003eSkin contains oil or lotion, or pads are worn\u003c\/td\u003e\n\u003ctd\u003eClean and dry skin; replace pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOne side feels stronger\u003c\/td\u003e\n\u003ctd\u003eUneven pad contact\u003c\/td\u003e\n\u003ctd\u003eReapply the entire unit evenly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedness remains after treatment\u003c\/td\u003e\n\u003ctd\u003eSkin sensitivity or irritation\u003c\/td\u003e\n\u003ctd\u003eDiscontinue use and seek advice if it persists\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe device became wet\u003c\/td\u003e\n\u003ctd\u003ePossible internal damage\u003c\/td\u003e\n\u003ctd\u003eDo not recharge or operate; contact Balego\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe available S1 instructions describe contact-detection behavior, the 20-minute timer, the charging indicator, and basic troubleshooting steps. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eProduct comparison\u003c\/h1\u003e\n\u003ch2\u003eiStim S1 vs. iStim X1 vs. Balego Digital TENS vs. Twin Stim IV\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"https:\/\/www.balego.com\/products\/wireless-tens-unit-menstrual-relief\"\u003eiStim S1 Menstrual TENS\u003c\/a\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"https:\/\/www.balego.com\/products\/wireless-heat-tens-unit\"\u003eiStim X1 Wireless Heat TENS\u003c\/a\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"https:\/\/www.balego.com\/products\/balego-tens-digital-edition-unit-with-100ma-output-and-5-modes\"\u003eBalego Digital TENS\u003c\/a\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary positioning\u003c\/td\u003e\n\u003ctd\u003eMenstrual-cramp and wearable pain relief\u003c\/td\u003e\n\u003ctd\u003eBroad-area wireless heat and TENS\u003c\/td\u003e\n\u003ctd\u003eCustomizable traditional TENS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMenstrual-specific FDA indication\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNot the primary product positioning\u003c\/td\u003e\n\u003ctd\u003eNo menstrual-specific indication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in heat\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless wearable format\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote control\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntensity choices\u003c\/td\u003e\n\u003ctd\u003e15 levels\u003c\/td\u003e\n\u003ctd\u003e15 levels\u003c\/td\u003e\n\u003ctd\u003eContinuously adjustable to 100 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTENS programs\u003c\/td\u003e\n\u003ctd\u003eOne fixed 100 Hz program\u003c\/td\u003e\n\u003ctd\u003eIntegrated TENS program\u003c\/td\u003e\n\u003ctd\u003eFive modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNMES\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003eIntegrated treatment zone\u003c\/td\u003e\n\u003ctd\u003eIntegrated treatment zone\u003c\/td\u003e\n\u003ctd\u003eTwo independent channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode positioning\u003c\/td\u003e\n\u003ctd\u003eFixed beneath wearable device\u003c\/td\u003e\n\u003ctd\u003eFixed beneath wearable device\u003c\/td\u003e\n\u003ctd\u003eTwo or four separate pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrode type\u003c\/td\u003e\n\u003ctd\u003eProprietary S1 pads\u003c\/td\u003e\n\u003ctd\u003eProprietary X1 pads\u003c\/td\u003e\n\u003ctd\u003eStandard pin-style pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eRechargeable\u003c\/td\u003e\n\u003ctd\u003eRechargeable\u003c\/td\u003e\n\u003ctd\u003eReplaceable 9V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTimer\u003c\/td\u003e\n\u003ctd\u003e20 minutes\u003c\/td\u003e\n\u003ctd\u003eProgram controlled\u003c\/td\u003e\n\u003ctd\u003e5–60 minutes or continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest fit\u003c\/td\u003e\n\u003ctd\u003eSimple wearable menstrual-cramp support\u003c\/td\u003e\n\u003ctd\u003eWireless heat\/TENS with remote control\u003c\/td\u003e\n\u003ctd\u003eMaximum TENS-setting flexibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe Balego Digital Edition offers five TENS modes, adjustable pulse rate and width, dual channels, up to four separately positioned pads, and longer timer options.\u003c\/p\u003e\n\u003ch3\u003eChoose the S1 when:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMenstrual-cramp relief is the principal reason for purchase.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA slim lower-abdominal design is preferred.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in heat is important.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExternal lead wires would be inconvenient.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSimple controls are preferred over multiple programs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eFrequently asked questions\u003c\/h1\u003e\n\u003ch2\u003eIs the iStim S1 FDA-approved?\u003c\/h2\u003e\n\u003cp\u003eThe correct wording is \u003cstrong\u003eFDA cleared\u003c\/strong\u003e. The underlying FT-615 Heating TENS device received 510(k) clearance under K232675 on October 5, 2023. \u003c\/p\u003e\n\u003ch2\u003eIs the S1 specifically cleared for menstrual cramps?\u003c\/h2\u003e\n\u003cp\u003eYes. The FDA includes temporary relief of pain associated with dysmenorrhea when used with OTC pain medication among the FT-615 indications.\u003c\/p\u003e\n\u003ch2\u003eCan the S1 replace pain medication?\u003c\/h2\u003e\n\u003cp\u003eThe FDA indication describes menstrual-cramp use \u003cstrong\u003ewith over-the-counter pain medication\u003c\/strong\u003e. The page should not promise that the S1 replaces medication or medical evaluation.\u003c\/p\u003e\n\u003ch2\u003eIs it a TENS or EMS unit?\u003c\/h2\u003e\n\u003cp\u003eIt is a TENS unit with heat. It is intended for sensory-level pain management, not strengthening or muscle re-education.\u003c\/p\u003e\n\u003cp\u003eFor information about the distinction, read \u003ca href=\"https:\/\/www.balego.com\/blogs\/which-modalities-to-use-guide\/balego-tens-vs-nmes\"\u003eBalego TENS vs. NMES\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eDoes the S1 have several TENS programs?\u003c\/h2\u003e\n\u003cp\u003eNo. It uses a fixed 100 Hz TENS program with 15 intensity levels.\u003c\/p\u003e\n\u003ch2\u003eDoes it have multiple heat levels?\u003c\/h2\u003e\n\u003cp\u003eThe available S1 instructions describe heat as on or off and list a maximum temperature of approximately 110°F\/43°C. Do not advertise several heat levels unless the manual in Balego’s current carton says otherwise.\u003c\/p\u003e\n\u003ch2\u003eCan TENS and heat run together?\u003c\/h2\u003e\n\u003cp\u003eYes. The heat and TENS functions can operate simultaneously. Heat may also be switched off while TENS continues.\u003c\/p\u003e\n\u003ch2\u003eHow long is a treatment?\u003c\/h2\u003e\n\u003cp\u003eThe S1 automatically shuts off after approximately 20 minutes. \u003c\/p\u003e\n\u003ch2\u003eCan the S1 be worn under clothing?\u003c\/h2\u003e\n\u003cp\u003eIts flexible, lead-free design is intended to be wearable. Loose clothing is preferable so it does not pull at the device or roll the pad edges. \u003c\/p\u003e\n\u003ch2\u003eCan it be used on the lower back?\u003c\/h2\u003e\n\u003cp\u003eThe FT-615 clearance includes appropriate back and waist applications. Follow the enclosed placement and safety instructions.\u003c\/p\u003e\n\u003ch2\u003eCan I use regular TENS electrodes?\u003c\/h2\u003e\n\u003cp\u003eNo. The S1 uses proprietary direct-attachment 50 × 56 mm gel pads.\u003c\/p\u003e\n\u003ch2\u003eCan I add electrode gel?\u003c\/h2\u003e\n\u003cp\u003eNo. Additional gel can interfere with adhesion and may damage the proprietary pads. \u003c\/p\u003e\n\u003ch2\u003eWhy does the device beep and shut off?\u003c\/h2\u003e\n\u003cp\u003eThe contact sensor may not detect a complete circuit. Confirm that both pads are fully attached to clean, dry skin and replace them if they no longer adhere evenly. \u003c\/p\u003e\n\u003ch2\u003eCan the S1 be used during pregnancy?\u003c\/h2\u003e\n\u003cp\u003eDo not apply abdominal or pelvic electrical stimulation during pregnancy. Consult an obstetric healthcare professional about appropriate pain management.\u003c\/p\u003e\n\u003ch2\u003eCan it be used while charging?\u003c\/h2\u003e\n\u003cp\u003eNo. Disconnect it from the charger before applying or operating it.\u003c\/p\u003e\n\u003ch2\u003eCan it be used while sleeping?\u003c\/h2\u003e\n\u003cp\u003eNo. Electrical stimulation and heated wearable devices should not be used during sleep.\u003c\/p\u003e\n\u003ch2\u003eIs menstrual pain always normal?\u003c\/h2\u003e\n\u003cp\u003eNo. Severe, worsening, or newly developed period pain may be associated with an underlying condition. Seek medical evaluation when symptoms are unusual, progressively worsening, or repeatedly interfere with ordinary activities. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWhy purchase the iStim S1 from Balego?\u003c\/h1\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/www.balego.com\/products\/wireless-tens-unit-menstrual-relief\"\u003eiStim S1 Wireless TENS Unit for Menstrual Relief\u003c\/a\u003e combines a menstrual-specific TENS indication, built-in warmth, rechargeable operation, and a slim wearable shape without external lead wires.\u003c\/p\u003e\n\u003cp\u003eBalego also provides:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFree shipping across the United States\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA \u003ca href=\"https:\/\/www.balego.com\/price-guarantee\"\u003eBest Price Guarantee\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAccess to the complete \u003ca href=\"https:\/\/www.balego.com\/collections\/tens\"\u003eTENS device collection\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEducational content in the \u003ca href=\"https:\/\/www.balego.com\/blogs\/tens-guides\"\u003eTENS guide library\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct assistance through the \u003ca href=\"https:\/\/www.balego.com\/contact\"\u003eBalego contact page\u003c\/a\u003e\u003ccode\u003e\u003c\/code\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iStim","offers":[{"title":"Default Title","offer_id":48855996236031,"sku":"S1","price":72.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/0570\/5983\/files\/S1-01_Wireless-TENS-Unit-Menstrual-Relief.webp?v=1784501582","url":"https:\/\/balego-stores.myshopify.com\/products\/wireless-tens-unit-menstrual-relief","provider":"Balego","version":"1.0","type":"link"}