This EMS unit is ideal for patients with chronic conditions or ones with longer term therapy requirements. Patients that may also benefit from TENS therapy should also consider a combination unit. Channel: Dual, Isolated between channels Pulse Amplitude: 0 - 100 mA peak to peak into 500 ohm load each channel Pulse Width: Ajustable, 50 - 300 µS, 10 µS per step Pulse Rate: Adjustable 2 - 150 Hz, 1Hz per step Contration / Relaxation / Ramp Time: Adjustable 2 - 90 seconds, 2 - 90 seconds, 1 - 8 seconds, 1 sec. / step Modes: Constant, Synchronous, Alternate Waveform: Asymmetrical Bi-Phase Rectangular Pulse Voltage: 0 to 50 V (Load 500 ohm) Timer: 5 - 60 minutes or continuous, adjustable in 5 minute increments, with a final countdown at 5 minutes Low Battery Indicator: On LCD screen when battery is low Includes Patient Compliance meter (60 sets of records, total 999 hours). Comes with a user manual, 4 electrodes, hard carrying case & battery.