Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. 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 currentoutput, variable surge and continuous mode and reverse polarity * Up to four electrodes *