KECOOLKE Ultrasonic Cleaner for Jewellery, 600 ml, Ultrasonic Cleaner with Digital Timer for Glasses, Rings, Coins, Ring, Silver, DenturesThe ultrasonic cleaner vibrates the water 42,000 times per second to remove hidden dirt. With the highest vibration frequency in the house, protein dirt can be removed and this dirt adheres to small parts and cracks that are difficult to treat with water. By creating micro vibrations in the water, the sound vibration wave penetrates the precious metal that the brush cannot reach and cleans stubborn dirt. Easy to use: fill the water tank and all the