The use of ultrasonic washers (so-called. ultrasonic cleaner ) allows cleaning of hard-to-reach surfaces such as diamond microdermabrasion heads or tools with a complex shape. [Larger Capacity] 650ml ultrasonic cleaner tank capacity can completely submerge the items to be cleaned, a one-time thorough cleaning, easier to clean and save time. [Compact Design] Compact body design, can easily fit into the luggage, will not occupy a large space. Suitable for use at home or take it with you when you go out to improve your travel experience. [Multifunctional Cleaning] Ultrasonic jewelry cleaner is made of 304 stainless tank, which is not easy to corrode and has a long service life. This jewelry cleaning machine only needs to add tap water. It can clean glasses, watches, jewelry, dentures and other items in a few minutes, so you can use clean items every day and go out fresh.The motor of device is NOT water prevented, be careful while adding and draining water. 1. Use a container to add water: Avoid using a direct water flow to prevent water from splashing onto the body and ventilation holes. 2. Cleaning Method: Do not rinse the inner chamber with running water directly to avoid damaging the device. 3. Draining Dirty Water: After cleaning, tilt the device to let the water flow out from the screen side. Always fill between the min and max water lines and use warm water with a small amount of dishwashing liquid or similar to enhance the cleaning power. Water levels that are too high or low will reduce effectiveness. For long-term reliability, do not use hot water or run the machine for more than 30 minutes without letting it cool down. Items that Can Be Cleaned in the washer: Jewelry - necklaces, bracelets, rings, earrings, body jewelry. Glasses & Watches - eyeglasses, sunglasses, waterproof watches, watchband. Hygiene ltems - combs, electric shaver heads, toothbrushes, dentures, razor blades. Stationary - pen-heads, printer-heads, seals, rubber stamps. Silver items that have dirt accumulation. Other ltems - tools, watch parts, coins, keychains, valves, machine nozzles, badges, metal dishware, instruments, filters, & kitchen utensils. Cannot Be Cleaned Glasses/sunglasses with pre-existing scratches or cracks in the coating. Silver items that are tarnished (discoloration due to oxidation). Jewelry containing loose stones or soft/porous stones such as pearls, emeralds, amber, and opal. NOTE: Please consult your local jeweler if you are unsure aboutwhether or not you should use the ultrasonic cleaner on yourspecific type of jewelry. Please fill water in the tank and place it on the table before connecting the power adapter to make sure it is safe.