... cleaning if no timer, it is CD-7820B popular the same as CD-2800 * can clean CD/DVD, which tank size, cleaning effect ... and price is same as CD-7810A* which PCB ... ..Daily personal care5.Dentures, combs, toothbrushes, tableware6. for CD,VCD,DVD disc cleaningSpecifications:1. Ultrasonic Frenquency:42,000Hz2. Tank Materials: ...