OMRON HeatTens is a drug-free pain relief device, certified as a medical device and safe for home use. It meets strict safety and performance standards for home medical devices. HeatTens provides dual therapy for muscles and joints by combining soothing heat and clinically proven TENS technology. Heat increases metabolism, relaxes muscles, and relieves pain. TENS therapy uses electrical pulses to activate the body’s natural pain relief mechanisms: blocking pain signals to the brain, releasing endorphins, and improving blood flow. The device features automatic programs for the back, shoulders, arms, and large joints (knee, elbow), along with 3 general massage modes. OMRON HeatTens works with gels and electrodes; gels last up to 30 uses and are replaceable.