Please prefer the right kind in line with your specific needs. The strength should be chosen in step with the quantity of the stainless steel cleansing tank. the bigger the complete calories of the transducer, the better the cleaning effect. The operating time can be set from 0 to 30 minutes. With degassing function. After the ultrasound begins working, continually press the "Ultrasonic ON/OFF" button three times to permit the degassing function. Eliminate oxygen from water and improve cleansing efficiency. Prevent oxidation and discoloration of helpful items. PCB has a heating program (if heating function is required, please purchase heating detail elements yourself). Ultrasonic frequency:40kHz. Power Input: Only supported AC 220V~240V or 110V-120V 120W Set: ultrasonic circuit board (1), 2 x60W transducer, control panel and connecting wire.(Suitable for less than 3L)Wiring: Only the connecting wires between circuit forums are delivered. Please buy the connecting cable between the transducers at your native shop reference diagram:Attention: Please purchase heating pads and temperature sensing cables from native stores detail connection reference diagram:Reference diagram for temperature sensing cord connection:Package Include:ultrasonic circuit board x1;60W transducer x 2;control panel x 1;Connecting line x1;