The TENS 7000 dual channel digital TENS includes device, lead wires, four self-adhesive reusable electrodes, 9V battery, hard plastic carrying case and instruction manual. Compliance meter, 60 records up to 999 hours. Power Source: 9-volt battery. Modes: Burst, Modulation, Constant, MRW, SD1 and SD2. Channels: Dual channel for use with two or four electrodes. Timer: 5 to 60 minutes, auto shutoff or continuous. 100 mA output. Pulse Width: 50 µS - 300 µS adjustable, 10 µS/step. Pulse Rate: 2-150 Hz, adjustable.