Protective cap over amplitude adjustment knobs. Asymmetrical, biphasic and square pulse waveform. Offers two, controllable output channels. Three modes: synchronous, constant and alternation. Timer features: 30 and 60 minute programs of fixed duration and one continuous. Adjustable O mA – 80 mA peak into 500 load each channel, constant current pulse amplitude. Included in hard plastic carrying case, two lead wires, four standard BodyMed electrodes (one pack), 9 volt battery and manual. 250 us fixed pulse width. 2 Hz – 120 Hz adjustable pulse rate. ON ramp adjustable 1 – 8 seconds. Cycle on and off times adjustable 1 – 30 seconds. One year warranty.