Wide Application It is applicable to all kinds of seafood machines, HVAC compressor, freezer, refrigerator, air conditioner, fermentation room, freezer, water cooler and other equipment that requires automatic changeover of refrigeration and heating. Calibration Function Temperature calibration, you can calibrate the temperature as needed. The digital temperature controller is worth buying. Good practicability You can choose cooling or heating mode. This temperature controller keeps your environment within the desired temperature range. Temperature control range: -50-110C. The control accuracy is 0.1C. Input power supply: AC 110-220V. Safe to use You can set the maximum/minimum temperature to avoid accidents. High temperature alarm, when the measured temperature reaches the setting temperature, the controller will give an alarm. Easy to use The thermostat-switch sensor automatically activates cooling or heating to maintain a constant temperature. A comfortable and convenient experience. Note: The data are all manually measured, please allow an error of 1-3 cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.