[Plug-and-play design, easy to use] Just plug in your heating/cooling device, set the desired start and stop temperatures, and the plug-in thermostat will do the rest. This plug-in thermostat automatically switches between heating and cooling modes to control your device according to your settings. Power: 100-250V AC; Output: 16A/230V max. [Temperature setting with ±1°C accuracy] Wide temperature setting range: -40°C to 120°C (-40°F to 248°F), with an accuracy of ±1°C/±2°F. Just set the start and stop temperatures for automatic control without complex wiring. For heating mode, set the start temperature lower than the stop temperature; for cooling mode, set the start temperature higher than the stop temperature. [Timer function] This thermostat also has modes F01 to F04: Cycle timer F01; CD ON, CD OFF, CD ON and CD OFF, respectively. You can select mode F01 to turn the device on and off at regular intervals, or select modes F02-F04 to set an on/off countdown timer. The setting range is 0 to 99 hours and 59 minutes. Please note that the temperature control mode and modes F01-F04 cannot be used simultaneously. [Multifunctional] This thermostat is equipped with a 10K NTC temperature sensor for fast response and to prevent thermal drift. It works in both Fahrenheit and Celsius. A built-in memory function retains settings in case of power failure. This digital thermostat supports temperature calibration for ultra-precise setting. It also has a reset function for restarting at any time. [Many applications] This thermostat is widely used in greenhouses, reptile cages, incubators, terrariums, freezers, refrigerators, heaters, home brewing systems, vivariums, fermentation tanks, heating pads, and other temperature control systems. It can also be used as a timer for cycle time and countdown.