Magnasonic Professional Ultrasonic Jewelry Cleaner with Digital Timer for Eyeglasses, Rings, Coins (MGUC500)Cleans dirty jewelry, eyeglasses, watches, utensils and more in minutes using only tap water (does not remove tarnish) Generates 42,000 Hz of ultrasonic sound waves for a powerful yet gentle clean that won't harm your valuables Digital display with 5 preset cleaning cycles (90, 180, 280, 380, & 480 seconds) and auto shut off Extremely easy to operate, includes basket to keep items secure Generous 20 oz (600 mL) capacity