Main functions: AH Afterheating/thermostat; Password protection; LOAD Tank heating OCEM emergency shutdown; OCCO cooling; OCMI minimum temperature OCFR Antifreeze; OTCO Tube ; PUMP Pump control mode; OSYC System cooling; OSTC Tank cooling; MAN Manual mode BLPR Blocking protection; OTDI Thermal Disinfection; UNIT C-F switch BEEP fault warning; Memory function; Screen protection; checking TECHNICAL DATA Size of Controller:178mm x120mm x43mm Power supply:AC100-240V,50-60Hz. Power consumption: Less than 2.5W Accuracy of temperature measuring: 0.1C Range of temperature measuring: -10C ~220C Range of tank temperature measuring: 0C ~110C Suitable power of pump: 1 pump possible to be connected, output power Less than 300W . Suitable power 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 : IP41 Plug Type:EU Plug,it applies to Indonesia, , , , and so on Voltage: AC100-240V color:As shown Material:plastic Package Contents: 1 x SR208C Solar Water Heat Controller(Wifi) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.