Main functions: AH Afterheating/thermostat; Password protection; LOAD Tank heatingOCEM emergency shutdown; OCCO cooling; OCMI minimum temperatureOCFR Antifreeze; OTCO Tube ; PUMP Pump control mode; OSYC System cooling; OSTC Tank cooling; MAN Manual modeBLPR Blocking protection; OTDI Thermal Disinfection; UNIT C-F switchBEEP fault warning; Memory function; Screen protection; checkingTECHNICAL DATASize of Controller:178mm x120mm x43mm supply:AC100-240V,50-60Hz. consumption: Less than 2.5WAccuracy of temperature measuring: 0.1CRange of temperature measuring: -10C ~220CRange of tank temperature measuring: 0C ~110CSuitable of pump: 1 pump possible to be connected, output Less than 300W .Suitable of (backup heating): 1pc 500W .Inputs: 3 sensors,1pcs*Pt1000 sensor (500C) for (silicon cable280C),2pcs*NTC10K, B3950 sensor ( 135C) for tank, (PVC cable 105C),Outputs:2 relays, for circulation pump and backup heating temperature:-10C ~ 50C.Water proof grade: IP41Plug Type:EU Plug,it applies to Indonesia, Germany, , Spain, and so onVoltage: AC100-240Vcolor:As shownMaterial:plasticPackage Contents:1 x SR208C Solar Water Heat ControllerOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.