Temperature measuring range: -50 ~ 99 C; Resolution: 0.1 C; Accuracy: 1 (-50 ~ 70 C); with 90cm sensor probe. Alarm for safety: Refrigeration control output delay protection, Dual heating and cooling function, Alarm when the temperature exceeds the limit or when the sensor error. Automatic heating and cooling: This digital temperature controller with sensor can control the equipment to heat or cool automatically. Automatically switches modes between cooling and heating, keeping the devices at the desired temperature. Easy to connect and program: Connect the controller and device to the power supply and connect the temperature probe, then you can program by simply setting the temperature value and the difference value. You can also set the delay time and temperature calibration value. Wide range of applications: This temperature controller thermostat can be used for household freezer, water tank, refrigerator, aquarium, home brewing beer, chicken incubator, etc., also suitable for laboratory use and other temperature-controlled systems. Note: The data are all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.