... -Circuit Design, Keep Water Away for Enhanced Safety· First Ultrasonic Cleaner to Introduce Cooling Fan for Prolonged OperationApplicationsProfessional Cleaning Great Cleaning Device ... Jewelry, Watches Straps and Bands, Glasses, Dentures, Toothbrushes, Table-wareSpecifications Ultrasonic Frequency42,000 HzTank MaterialStainless Steel SUS304Tank Capacity2500mlQuiet, Solid States CircuitryTimer5 ...