Trister Tens Electrical Nerve Stimulator (TS‑700TENS) 5 Stimulation Modes, 9 Intensity Levels, 3‑Year Warranty, Portable Pain Relief For Muscles & Joints

Transcutaneous electrical nerve stimulation (TENS) therapy involves the use of low-voltage electric currents to treat pain. A small device delivers the current at or near nerves. TENS therapy blocks or changes your perception of pain.