This ultrasonic Jewelry and Eye Glass Cleaner is a quick economic chemical-free way to clean anything from jewelry to electric shaver heads. The cleaner uses ordinary tap water instead of harsh chemicals. The 16-ounce stainless steel tank cleans jewelry dentures eyeglasses watches electric shaver heads and even printer heads by generating 42 000 energy waves per second in a quick quiet fully automatic 3-minute cycle. Can be used professionally by jewelers dentists artists and more. 3-minute auto shut-off 90-day warranty