360° deep cleaning: The frequency of the ultrasonic cleaner is 45000Hz. Tiny blisters created by ultrasound can easily reach the grooves and quickly remove these stubborn stains. The powerful ultrasonic cleaner provides 360° deep cleaning without damaging the smooth surfaces of glasses, watches, rings, coins, dentures, utensils, chains and more, especially jewelry. Optimized cleaning results: This ultrasonic cleaner generates millions of tiny bubbles with 45,000Hz sound waves, thoroughly cleaning hard-to-reach areas without the use of harsh chemicals and protecting your valuables. Improved violet light waves: The glasses ultrasonic device 45,000 Hz high-frequency vibration and violet light waves can effectively remove stains and disinfect objects, making cleaning more thorough and safer to use. The rechargeable ultrasonic cleaner is designed to charge via USB, making it more portable and eliminating the need for a power outlet. It also reaches a maximum capacity of 250 ml, so you can easily clean items of many sizes. Multiple uses: Suitable for removing stubborn dirt from bracelets, toothbrushes, dentures, braces, jewelry, waterproof watches, glasses, razor heads, combs, metal cutlery, etc. Note: Glasses/sunglasses with scratched or cracked coatings should not be washed.