A Ultrasonic wave of 46,000 cycle per second is generated through the cleansing liquid. The action of this longitudinal wave because dielectric pressure to build up, resulting in numerous micro-vacuum bubbles producing the effect of cavity. When these bubbles explode, the force of their explosion removes the encrusted dirt, grime or other undesirable substance, even in tiny, hard-to reach corners. Its efficiency is remarkable. Detail Internal Tank Size: 295 x 150 x 100 mm External Dimension: 320 x 175 x 240 mm Tank Capacity: 4.5 Liter