Temperature measuring range: -50 ~ 99 °C; Resolution: 0.1 °C; Accuracy: ±1 (-50 ~ 70 °C); with 90 cm sensor probe. Safety alarm: Output delay protection. Refrigeration unit, dual heating and cooling function, alarm when temperature exceeds limit or when there is a sensor error. Automatic heating and cooling: This controller can control the equipment to heat or cool automatically. Automatically switches between cooling and heating modes, keeping the units at the desired temperature. Easy to connect and program: Connect the controller, connect the device to the power supply and temperature probe, then you can program it by simply setting the temperature value and difference value. You can also set the delay time and temperature calibration value. Wide range of applications: This thermostat can be used for home freezing, water tanks, refrigerators, aquariums, home brewing of beer, chicken incubators, etc., and is also suitable for laboratory use and other temperature-controlled systems. Note: All data is measured manually, please allow 1-3 cm error. Due to differences in light and display, there will be a certain color difference; the actual object is standard. It will apply.