Description: 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% Specification: How to use Connect the power supply and the load, you can supply to the controller It displayed as a measured temperature Press the SET button, the display flashes the temperature Press - to set the desired temperature After setting press SET to confirm return The controller automatically performs the relay by setting off Lights, LED status descriptions Indicator: Off The relay is switched off, Always indicate the relay is closed LED: Shows LL is the sensor open, showing HH is out of range, the thermostat will be forced to close the relay, the display -as high temperature protection Package Includes: 1 Piece of Digital Thermostat Sensor(3 Pack)