Temperature measurement range: -50 to 110°C (-58 to 230°F); Resolution: 0.1℃ at -9.9 to 99.9, and 1℃ between other temperatures; Refresh rate: 0.5s Two-color LED display: The temperature controller monitors the instrument and simultaneously displays the measured temperature (red) and the setting temperature (blue). Can be used in cooling/heating mode to test indoor or outdoor temperature. Waterproof Design: NTC probe (10K 0.5%) is waterproof, and you can check the temperature at will, you can also control heating or cooling according to different needs. Reliable to Use: The electronic temperature control switch module has been tested for consistency and reliability, and its control accuracy is 0.1 degrees Celsius, reaction accuracy is 0.1 degrees Celsius with high-temperature protection. Wide Application: Electronic thermostat can be widely used in smart home and industrial appliances, household appliances, automatic irrigation, office machines, audio, vehicles, aquariums, fish tanks, and so on. Temperature Setting: Press the set button for five seconds, then you will enter the main setting menu, and press STC(+) and C/F(-) to switch to P0 - P8. Press the STC button and the LED light will flash. Press the STC(+) and C/F(-) buttons to reach the setting temperature and wait 3 seconds before the module automatically saves the settings and exits. Index: The light is on and the relay is closed; The light goes out and the relay is turned off. LED display: Red: Measured temperature; Blue: Setting temperature LLL: Indicates that the sensor is on Hhh: Indicates that the temperature is outside the module's measurement range : Indicates that the module is protected at high temperature Introduction to Programmable Thermostat (Code, description, setting range, factory setting): P0, heating/cooling, H/C, C P1, return difference, 0.1-30, 2 P2, set maximum limit, + 110, 110 P3, set minimum, - 50, - 50 P4, temperature correction, - 15 - + 15, 0 P5, delayed start, 0 - 10, 0 P6, high temperature alarm, - 50 - + 110, off P7, C/F, CS/FH, CS P8, factory reset, ON-OFF, OFF