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