TENS Single Mode Developed for continual treatment for pain therapy. Features Include: Dual Channel, Standard Output, Pulse Width 60- 250 Microseconds, Adjustable, Pulse Amplitude: 0-80v Each Channel (500 OHM Load), Wave Form: Modified Square Wave with Zero Net D.C. Component, 3 Year Warranty. Includes: TENS, lead wires, 4 self-stick reusable electrodes, 9 volt battery, hard plastic carrying case, & instruction booklet.Insurance Code: E0730.