Digital LED Microcomputer Thermostat Controller Switch Temperature Sensor 12V : Temperature measurement range: -50Celsius-110Celsius Temperature 0.1,other paragraph 1 Celsius Accuracy: 0.1Celsius Return difference accuracy: 0.1Celsius Refresh rate: 0.5s High temperature protection: 0-110Celsius The input voltage: DC12V Measurement input: NTC (10K 0.5%) waterproof type sensor Output: 20 a relay all the way Environmental requirements:-10Celsius,-60Celsius humidity 20%-85% Size:47.5mm(length) x 28.7mm(width) x 32mm Hole size: 46 x 26.5mm Introduction: Power consumption: Static current ≤35MA pull current: ≤65MA Connect the power supply and the load supply to the controller. The currently measured temperature (top) is displayed as red. The desired temperature to be set (bottom) is blue. Press STC (+) C / F (-) to set the desired temperature. 3 seconds after setting just confirm that it has been set, then the controller will automatically execute. The thermostat output is 10A relay which meets a variety of high-power loads, but just make sure that the line is connected correctly. LEDs, LED Status Description. LED: Off indicates the relay off; Always indicates the relay is closed. Digital tube: if the open display HH LL sensor measurement range is exceeded, the thermostat will be forced off the relay display. This is high temperature protection.   The package includes: 1pc x Thermostat Controller 1pc x Temperature Sensor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.