PLEASE NOTE THIS ITEM CANNOT SHIP VIA 3 DAY DELIVERY. Stimulator features Dual channel, four pad stimulator Dual intensity controls Polarity control Bipolar application no dispersive pad Selectable frequency, pulse width, 'onoff' surge duration Surge and reciprocal modes ramped Intensity reset circuit Patient treatment stop switch Ultrasound features Lightweight, standard transducer Cable fault alarm system Transducer protection switch Adjustable interrupted output mode 0 20 watt output 30 minute timer