Drive's Economy Dual Channel TENS Unit will help you along in your physical therapy or rehab process. The TENS unit is intended for use in pain reduction. The Dual Channel TENS unit let's you adjust the pulse width and frequency, as well as the intensity. The Dual Channel TENS kit includes a carrying case, a package of electrodes, a 9 Volt battery , and 2 lead wires. See Additional Information Tab for a description of TENS Unit application.