... -2800 is the most influential model among all ultrasonic cleaners in ChinaIts industrial design, sizes and specifications ... : necklaces, earrings, rings, bracelets, etc2.Gems 3. watch straps and bands or water-proof watches4. Glasses, sunglasses, ... cares: shavers, dentures, combs, toothbrushes, tableware Specifications:1. Ultrasonic Frenquency:42,000Hz2. Tank Materials: Stainless steel SUS3043. Tank ...