The energy needs to be chosen in keeping with the quantity of the stainless steel cleaning tank. the larger the complete strength of the transducer, the better the cleaning effect. The working time would be set from zero to 30 minutes. With degassing function. After the ultrasound starts working, continuously press the "Ultrasonic ON/OFF" button three times to allow the degassing function. Eliminate oxygen from water and improve cleansing efficiency. Prevent oxidation and discoloration of favourable items. PCB has a heating program (if heating operate is required, please purchase heating detail ingredients yourself). Ultrasonic frequency:40kHz. Power Input: Only supported AC 220V~240V 240W Set: ultrasonic circuit board (2), four x60W transducer, leadership panel and connecting wire.(Suitable for lower than 10L) Wiring: Only the connecting wires between circuit forums are delivered. Please buy the connecting cable between the transducers at your local store.