The Geti GUC 851 Ultrasonic Cleaner cleans everything from surface dirt using only water and the vibrations generated by ultrasound. The 42 kHz ultrasonic waves create vibrations that produce the cavitation effect, generating millions of microscopic bubbles that penetrate even the finest folds and cavities of the item being cleaned. The bubbles, along with the vibrations, remove dirt from the entire surface of the item. Glasses, rings, chains, watches… .. just put it in the tub or case, pour water, and the device will do everything for you. Silent operation, low power consumption.