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 S To 250 S Adjustable * Pulse Rate:2 Hz To 150 Hz Adjustable * Wave Form:symmetrical Bi-phasic Rectangular Monophasic Rectangular * Operates On 2 Aa Batteries (included) * Timer