System Includes Device Lead Wires Four Self-adhesive Reusable Electrodes 9v Battery Hard Plastic Carrying Case And Instruction Manual 3 Modes: Standard Modulate And Burst Dual Channel 30 And 60 Minutes Or Continuous Timer Adjustable Pulse Width: 50-250 Microseconds Pulse Rate: 2-150 Hz Pulse Amplitude: 0-80 Ma Each Channel Waveform: Asymmetrical Biphasic Square Pulse One Year Warranty Fda Approved