Includes Device, batteries, lead wires, 1-4pack of electrodes, carrying case and users manual * Channel: Dual Channels, Isolated between channel * Output Maximum 130 mA (peak value) across 500 Ohm load * Pulse Width From:50 µS to 250 µS adjustable *  Pulse Rate:2 Hz to 150 Hz Adjustable * Wave Form:Symmetrical bi-phasic rectangular Monophasic rectangular * Operates on 2 "AA" batteries (included) * Timer