TENS Unit Dual Channel w/ Timer

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 RX required