Ultrasonic Cleaner 42,000Hz of Energy Wave Ultrasonic Jewelry Cleaner. Clean your jewelry, waterproof watches, eyeglasses, razor heads, printer heads, fountain pens, antique coins, badges, small silverwares, small machined metal parts and many more This cleaner works quietly by means of an ultrasonic transducer, unlike other 'sonic' cleaners that make buzzing noise while soaking your items. See the dirt separate off into the water through the view window! The cleaner is compact and so stylish enough to keep it in your kitchen counter!