The FabStim analog unit uses a microprocessor, which gives exact dial performance. Benefits includes maximum full strength power of 80 mA. The safety amplitude cap protects the amplitude knobs from accidental bumps or knob movements. System includes device, lead wires, four self-adhesive reusable electrodes, 9V battery, hard plastic carrying case and instruction manual. Power Source: 9-volt battery. Modes: Standard, Modulate and Burst. Channels: Dual. Timer: 30 and 60 minutes or continuous. Pulse Width: 50-250 Microseconds, Adjustable. Pulse Rate: 2-150 Hz. Pulse Amplitude: 0-80 mA each channel. Waveform: Asymmetrical biphasic square pulse. One year warranty.