... circuit, transform the alternating current 220V/50HZ to 35KHZ,once again transform to mechanical energy by transducer. Ultrasonic`s working ... .Efficiency:150beads/min Features and functions1.This unit can fix beads instantly on the material (velvet, jeans, knitted fabric, PU leather, ... leather) by ultrasonic.2.This unit is applied mainly to the hot fix of shoes, underwear, children's wear, T-shirts, ...