Unit Provides ultrasound dual channel high volt pulsed DC stimulation and low volt galvanic. Used for iontophoresis. Up to 20 watts of variable or non-interrupted ultrasound. High Voltage features reciprocal and ramped surge modes with adjustable surge duration (1-160pps) Balance Control Feature Lo Volt Galvanic has constant current output variable surge and continuous mode and reverse polarity. Up to four electrodes *