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