For operator control and comfort, the Sheenus ZERO provides variable amplitude between 19 - 29 kHz per second and produces minimal hand vibration. Conveniently portable and easy to maneuver, the Sheenus ZERO controller weighs just 3 lb 5 oz, or 29% less than NSK’s previous ultrasonic polisher. The resin body handpiece, lightweight and ergonomically designed, enables effortless, precision work over long periods of time.