Includes interferential, premodulated, medium frequency (Russian) and biphasic stimulation make this stimulator both flexible and economical. Features two channels with independent treatment protocols, intensity controls, timers and displays. Treat two different body parts, two different clients or use in combination therapy with the Sonicator models. Choose from surge, reciprocation, surge with reciprocal or vector rotation modes. Dimensions: 13" x 16" x 4" (33 cm x 15.2 cm x 11 cm).Weighs 5 lbs. UL listed.