1,Smart Digital Thermostat Controller: the external temperature detector can detect the temperature, set the opening temperature and closing temperature, and has the functions of cycle timing, timing opening, timing closing and timing switch. 2,Temperature Correction Function: real time temperature correction range is -9.9-9.9℃. 3,-40-120℃ Range Refrigeration or Heating Mode: real time temperature range from -40℃ to 120℃, refrigeration and heating mode are available. 4,Memory Function: all current settings will be saved if power off, easy to use. 5,Different Timing Modes for You: cycle or countdown timer. You can set the start or stop time in the unit of minute range: 0-59 mins and hour range: 0-99 hrs. 6,Large LCD Display: provides sharp digital readout and good visibility when in the sun or under low-light condition. 7,Solid PC Construction: flame retardant PC shell is safe and offer you long service life, and soft High quality silicone buttons are easy to operate. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.