The Best Ultrasonic Jewelry Cleaner. This is the ultrasonic jewelry cleaner selected best for effectiveness and ease of use in tests conducted by the Hammacher Schlemmer Institute. The cleaner scored highest for effectiveness because it generates 42,000 Hz of ultrasonic sound waves that remove dirt and dust particles from rings, bracelets, and necklaces without manual scrubbing or harsh chemicals. It scored best for ease of use because it has a 16 oz. stainless steel tank (for proper sound wave impedance), an easy-to-read maximum fill line, and uses plain tap water for cleaning. It has a three-minute auto-shutoff setting and a viewing window with a light that illuminates the interior while in use. The cleaners whisper-quiet, solid state circuitry prevents noise, and it is als o suitable for precious metals and gems, waterproof watches, CDs, dentures, and eyeglasses.
