... Timer 5 working circles, choose time freely Ultrasonic Cleaner ApplicationsFamily,Office,Beauty salon, Laboratory,Electron workshop, Glasses ... , feeding bottle and nipple, Ancient coin,Valve,Machine nozzle,etc Specially designed for CD, VCD and DVD cleaning ... Tightened lid design for effective noise reduction Ultrasonic Cleaner Specification Ultrasonic Frequency 42,000 HzTank MaterialStainless Steel ...