Features: Temperature range: -50-110 Dimensions: 48.5 * 40mm Temperature control mode: ON/OFF Resolution: when the temperature is 0.1, the resolution is -9.9-99.9, the other temperature segment is 1 Control accuracy: 0.1 Hysteresis accuracy: 0.1 Refresh rate: 0.5S High temperature protection: 0-110 Power supply voltage: 12VDC Static current: 35MA, pull-in current 65MA Output voltage: 12V DC Output power: 20A relay Measuring input: NTC waterproof sensor (10K 0.5%) Environmental requirements: -10 ~ 60 , humidity 20% -85% How to use: Connect the power supply and the load, you can supply power to the controller, 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 the return, The controller automatically performs the relay by triggering! Lights, LED status descriptions : Indicator: Off The relay is off, always indicate the relay is closed. LED: Indicates LL is the sensor open, indicating ?HH is out of range, the thermostat will be forced to close the relay, the display --- as high temperature protection. Package Included: 1 x -50-110C Red Digital Thermostat Temperature Control Switch 12V + Sensor