Comfytemp Wirelss TENS Machine for Pain Relief, Nerve Muscle Stimulator for Pain Management with 15 Modes, 2 Pads, Rechargeable TENS Unit for Back, Neck, Shoulder, Knee, Arthritis Sciatica Cramps PainTargeted Pain Relief: Comfytemp TENS machine uses mild, safe electrical signals to the nervous system to inhibit pain, which is beneficial for chronic pain and long term pain management. This wireless TENS unit with remote control is safe to use, directly targets painful areas of the body for more effective and immediate relief, such as shoulders, neck, back, waist, abdomen, arms, thighs, etc. Wireless Portable Design: Say goodbye to cluttered wires,