HDE Ultra Sonic Jewelry Cleaner for Gold, Silver, Gem Stones, Coins, and More Cleans your jewelry, coins and dentures at home Uses tap water with mild detergent. No toxic solvents or harsh chemicals. Sonic vibrations up to 5800 waves per min. Normal cleaning cycle: 3~5 min. Cordless operation. Compact size: 3.5" x 3" x 3"