What is TENS? Transcutaneous Electrical Nerve Stimulation is a safe, non-invasive, drug free method of controlling pain. It reduces pain by sending small electrical impulses through electrodes that are placed on the skin to underlying nerve fibers to modify your pain perception. With Drive Medical manufacturing these accessories for TENS is very durability and the quality is long lasting. The Drive Medical accessories for the TENS equipment are batteries, rechargeable batteries, battery charger, lead wires and conductive gel.