?Wide Range of Application?This thermostat plug socket is widely used for greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fridge, homebrew, vivarium, fermentation, heat mat, and other temperature-controlled system. It can also be used as a timer for cycle timing and countdown. ?More functions?3m NTC 10K temperature sensor probe. Large LCD display. Temperature calibration. Reset function. Data storage function to save all parameters set after power down. This series of thermostatic plug and socket is widely used in temperature control systems for greenhouses, reptiles, incubators, glass containers, freezers, refrigerators, heaters, freezers, homebrewing, animal breeding, fermentation, and hot pads. It can also be used as cycle timer and countdown timer. ?Timing Function?F01~F04 Cyclic Timer and Countdown Mode: F01 Cyclic Timer Mode; F02 Countdown On Mode, F03 Countdown Off Mode, F04 Countdown On and Countdown Off Mode. You can choose F01 mode to control the working cycle of the device, or choose F02~F04 mode to countdown to turn on or off the device. Setting range:0~99 hours and 59 minutes. Please note that this thermostat plug can only work in one mode. ?Heating & Cooling Mode?Temperature control range:-40?~120?,Temperature control accuracy:±1%. This digital temperature controller plug is easy to program. Set the start temperature and stop temperature, set the heating or cooling mode work according to the program. Start temperature > stop temperature, cooling; start temperature < stop temperature, heating). This thermostat plug also supports temperature calibration for more accurate results. ?Relay output?Easy to program and safe to use. This thermostat plug socket can display in Celsius or Fahrenheit. Temperature control range:-40?~120?/-72?~176?. Power supply:100~250V AC 50/60Hz.