1.220V, single phase 2.power range:0.25~2.2kw 3.50hz or 60hz Single Phase Automatic ControllerItem No.: M18-DVoltage: 220Vphase: singlepower range: 0.25~2.2kwFrequency: 3.50hz or 60hz character: a) Water level control is completely automatic, works without adjustment, easy for installation and use. b) Circuit diagram of water level control with anti-high-voltage design. c) Voltaic wire of circuit ...