This is the eyeglasses cleaner that uses 42,000 Hz of ultrasonic sound waves to remove dirt and dust particles without manual scrubbing or harsh chemicals. Its wide 25-oz. stainless-steel tank (for proper sound wave impedance) holds two pair of eyeglasses and completely detaches from the unit for easy filling under a sink using plain tap water. Three power cycles and five timed settings (from 90 seconds to six minutes) provide controlled cleaning for even the most delicate or soiled items. The cleaner's whisper-quiet, solid-state circuitry prevents noise, and the unit is suitable for precious metals and gems, waterproof watches, CDs, dentures, rings, bracelets, and necklaces. Includes a basket, watch stand, and CD rack. Plugs into AC. 5 1/4" H x 8 1/4" W x 8" D. (2 3/4 lbs.)