... Isolated-Circuit Design, Keep Water Away for Enhanced Safety· First Ultrasonic Cleaner to Introduce ... Jewelry, Watches Straps and Bands, Glasses, Dentures, Toothbrushes, Table-wareSpecifications Ultrasonic Frequency42,000 HzTank ... MaterialStainless Steel SUS304Tank Capacity2500mlQuiet, Solid States CircuitryTimer5 Cycles, with Digital ...