Dual Relay OutputThe thermostat controls two radiators synchronously: cooling and heating devices can be connected, maximum output load: 3000W (230V). It's Plug and PlayWhen the start temperature > stop temperature, the temperature controller connector works in cooling mode; When the start temperature < the stop temperature, it will work in heating mode. Dual display windowTo be able to display the measured temperature and the set temperature at the same time, Celsius and Fahrenheit can be switched. Temperature calibrationTemperature measuring range: -50~100, wide temperature control range (-50~42)The heating and cooling differential function (hysteresis) can be set separately for cooling and heating ApplicationThis digital temperature controller is widely used for greenhouses, vivariums, reptiles, incubators, terrariums, refrigerators, heaters, freezers, refrigerators, home brews Instructions: Turn on, press the SET button for 3 seconds until the display starts flashing. Then adjust the temperature with the decrease and increase buttons Press the SET button for 1 second to save the settings When the start temperature > the stop temperature, the temperature controller connector works in cooling mode; when the starting temperature < the stopping temperature, it will work in heating mode. Temperature measuring range: -50C ~ 100C Wide temperature control range (-50~42) The heating cooling difference function (hysteresis) can be set separately for cooling and heating Maximum power 3000W Maximum load current 16A Size: Temperature controller: 13.5 * 6.8 * 3.4cm Power cable: 1.3 * 2m Temperature sensor wire: 1.8m Package contents: Temperature controller temperature * 1