... to reduce the noise Ultrasonic CD DVD Cleaning Machine Application: VCD,DVD disks,hardware,jewelry,watches,necklaces,earrings, ... Printer ink cartridge, dentures, comb, toothbrush. Ultrasonic CD DVD Cleaning Machine Specifications: ModelVGT-1000A/1000BUltrasonic Frequency40 KHzTank MaterialStainless Steel ... container5400pcs Any question for ultrasonic cleaners, please feel free to contact us. Thanks.