Color:No CaseSpecifications: Model: W1209 Dimensions: 48.5 x 40mm Temperature Control mode: ON / OFF Temperature Range :-50 - 110 degree centigrade Resolution: When temperature is 0.1 degree, the resolution is -9.9~99.9, other temperature segment is 1 degree. Control Accuracy: 0.1 degree Hysteresis Accuracy: 0.1 degree Refresh Rate: 0.5s High Temperature Protection 0 - 110 degree centigrade Supply Voltage: DC 12V Static Current: Less than 35MA, attract current less than 65MA Output Voltage: DC 12V Output Power: 20A relay Measurement Input: NTC (10K 0.5%) Waterproof Sensor Environmental Requirements: -10 - 60 degree centigrade; Humidity 20% - 85% Instructions for use: Connect the power supply and equipment, the measuring temperature is displayed, press the inchSETinch button, press inch + or - inch to set the desired temperature (long press inch + or - inch to quickly increase or decrease), press inchSETinch to confirm the setting and return, controller automatically performs the relay ON/OFF. the thermostat output is 10A relay, meet a variety of high-power loads. LED Indicator: LED off indicates the relay off; Lighting, indicates the relay is closed. Digital LED Tubes: inchLLinch indicates sensor open, inchHHinch indicates overrange, the relay will be forcibly disconnected; inch---inch indicates high temperature alarm Long press the inchSETinch button to enter the main menu settings, press inch + or - inch to switching between P0-P6, then long press inchSETinch or 10 seconds without keystrokes to confirm the setting and return. Package Included: 1pcs W1209 12V DC Digital Temperature Controller Board