... Ultrasonic Cleaner ApplicationsFamily,Office,Beauty salon, Laboratory,Electron workshop, Glasses shop,Jewelry shop,Clock shop, Watch shop,Mobilephone repair shop,Hospital ... designed for CD, VCD and DVD cleaning Use only plain tap water Digital program,5 working ... lid design for effective noise reduction Ultrasonic Cleaner Specification Ultrasonic Frequency 42,000 HzTank MaterialStainless Steel ...