This Biomedical Life Systems BioStim NMS2 Stimulator is extremely flexible, powerful, comfortable and user friendly! Features Functions like a T.E.N.S. in constant mode to achieve pain relief. The patient or therapist can easily toggle from pain relief settings, to a muscle building program with the push of one button Adjustable Constant, Cycled and Reciprocal open programs. Holds custom settings . There are 8 user friendly pre-set therapy settings to accommodate a wide population range from pediatric applications to professional athletes. The device holds up to three custom programs and it is easy for the patient to toggle between them. The custom programs remain set into the device until they are changed or reset. The Patient Compliance meter starts recording how many hours the device has been used from the first time it is issued to the patient, until the device is reset by the dealer or therapist. The adjustable pulse width setting enables patients of all tolerance levels to achieve success in their rehab program. Specifications Dimensions 3.9 x 2.6 x 1.3 Weight 8 oz Channels Dual Waveform Symmetrical biphasic square SYM and Asymmetrical biphasic square ASYM Pulse Rate Adjustable 1-120 Hz Hertz ; pulses/sec Pulse Width Adjustable 50-400 S microseconds Ramp On 0-10 seconds Ramp Off 0-10 seconds On Time 0-99 seconds Off Time 0-99 seconds Delay 0-99 seconds Patient Timer 0-99 minutes Modes 1. Constant 2. Cycled 3. Reciprocal adjustable Therapies 8 Preprogrammed fixed Intensity/Output Voltage Continuously adjustable from 0-120mA peak 0-60V /- 10% Tolerance All parameters /- 2% unless otherwise noted Power Supply 4 AA Batteries, type LR6 1 Each / Each