Multi-function: F01 cycle timer mode; F02 countdown on mode, F03 countdown off mode, F04 countdown on mode and countdown off mode. Setting range: 0 to 99 hours and 59 minutes. With data storage function, after switching off, all set parameters can be saved<br>More safety: thermostat socket with sensor adopts highly conductive copper plate, rust protection; the shell is made of flame retardant PC material, flame retardant at high temperatures. The socket has a safety protection door to avoid electric shock caused by inserting fingers or small objects and prevent children from accidentally plugging in<br>Temperature calibration: press and hold the MODE button when power on, and set the temperature 2 seconds later in real time. Real-time temperature calibration range: -9.9~9.9℃ Press and hold the SET button for 5 seconds to automatically end the calibration without saving the changes<br>Widely Used Widely used in greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, refrigerator, home brewery, pet food room, fermentation, heating pad and other temperature control systems. It can also be used as a timer for cycle time and countdown<br>High performance: the temperature controller can be displayed in degrees Celsius or Fahrenheit with a 1.8 m NTC temperature sensor. Temperature control range: -40°C~120°C/-72°F~176°F, accuracy of temperature control: ±1%AC 50/60Hz. Output: Maximum 16A/230V/3680W Starting temperature &gt; stop temperature, cooling operation starts; start temperature &lt; stop temperature, heating mode begins