[Widely Use]: ultrasonic jewelry cleaner comes with a plastic basket, watch holder, and CD holder. It's an ideal device for laboratories, electronic shops, glasses shops, jewelry shops, clocks and watches shops, dentistry, office and home use. [Professional]: Professional Digital Ultrasonic Glasses Cleaner creates 42,000 Hz frequency, ensures more efficient cleaning results, and remains harmless to what you put in, even the most subtle pearl jewelry. Note: When cleaning jewelry inlaid with diamonds or other things, use it with the attached basket to protect the jewelry. [Easy to Use]: The simple control panel with 3 buttons(ON/OFF/SET) is very easy to operate. The portable ultrasonic jewelry offers 5 different time modes, you can press the SET button to choose the working cycle freely (180s/280s/380s/480/90s). When reach the time you set, the unit will automatically stop. [Large Capcity]: The stainless steel water tank in the ultrasonic cleaner can hold 25oz/750ML of water. Basically can accommodate your Jewelry, Eyeglasses, Watches, Dentures, Dental tools and more Cleaning, meet household and personal daily cleaning needs. Professional Ultrasonic Jewelry Cleaner, 360-degree cleaning to make your jewelry sparkle The professional-grade ultrasonic cleaner vibrates water 42,000 times per second. By creating micro-vibrations in the water, sound vibration waves penetrate deep into precious metals that brushes cannot reach to remove hidden dirt. 360 effective and deep gentle cleaning through millions of tiny cleaning bubbles produced by ultrasonic waves to make jewelry sparkle. Note 1. Be sure to fill water into the tank before power on. Do not clean glasses/sunglasses with protective film. Water do not exceed the max level. 2. Do not place the cleaner in a damp environment. 3. PLEASE DON'T put plated items into the tank. 4. The ultrasonic cleaner can not remove the oxide layer. 5. After the ultrasonic has been working continuously for 10 minutes, the machine needs to be rested for 10 minutes to cool down, and the water needs to be changed every half an hour to get a better cleaning effect. 6. Please do read the user manual before using it. If you are not sure whether ultrasonic cleaner can clean a specific type of jewelry, please consult the jeweler. 7. The ultrasonic cleaner can not remove the oxide layer. PRODUCT FEATURES Professional portable digital ultrasonic jewelry cleaner 5 working cycles (180s/280s/380s/480s/90s)3 304 SUS 750ml tank & Ultrasonic frequency 42,000 HzB Built-in removable basket & watch holder & CD rackE Easy to operate & LED digital displayL Low noise & Auto shut off Used for cleaning various items You can use this ultrasonic cleaner to clean your eyeglasses, watches, denture, jewelry & accessory (like rings, necklaces, bracelets, anklets, brooches, tie pins, cufflinks, combs, etc.), shavers head, metals, or other small parts (like ancient coins, small metal accessories, bearings, etc.) Not suitable for: Many gemstones can be easily damaged by ultrasound. Do not put in softer gemstones such as opals, lapis lazuli, emeralds, turquoise, etc. Organic jewelry such as pearls, coral pieces, or amber can also be damaged. Also, do not put inside your ultrasonic cleaner gemstones whose color has been enhanced through heat treatment. Usage Method 1. Please fill the tank with water. 2. Place the items on the washing basket to make them completely immersed. 3. Switch it on, set the cleaning time, and start cleaning. Tips Please do not exceed the highest water level when adding water. For daily cleaning, just use tap water and normal cleaning liquids For very dirty products, use warm water and special cleaning liquids and repeated cleaning to achieve better results.