Electrotherapy Stim Machine provides pain relief with no side effects. TENS machines are physical therapy devices that can help reduce and relieve muscle and joint pain without the side effects associated with medications. Offers immediate muscle pain relief. TENS Therapy is a drug-free pain relief method often used as a muscle stimulator for chronic pain management, muscle pain, or to support the healing process of injuries. Electrical impulses stimulate the nerves to reduce pain. Tens Electric Massager features 6 modes and 19 intensity levels for pain and muscle relief. The TENS unit helps relieve pain associated with sore and aching muscles in the shoulder, waist, back, neck, and upper and lower extremities (arm/leg) due to strain from exercise, overwork, or daily household activities. Activates the body's natural pain gate mechanism, allowing you to relax anytime with this professional-grade TENS electrotherapy pulse massager and accessories. The TENS unit replacement patches have been upgraded with enhanced adhesive technology, providing better stick performance and easier cleanup for extended lifespan. Compatible electrodes (2mm pin, pigtail style) are widely available on the market. Package includes a USB cable (no adapter) that can be connected to a wall charger, power bank, or laptop USB port for charging. One full charge provides up to 40 hours of use, offering a more environmentally friendly and longer-lasting alternative to AA batteries compared to other devices. Color: Black Material: ABS Package Contents: 1 x EMS Massager (Dual Channel, 1 for 4) Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.