12V DC LED Digital Temperature Controller Thermostat Heating Cooling -20 - 100°C

What is this?The digital temperature control switch is a multifunctional tool for precise temperature control, mainly used in home brewing equipment, aquariums, greenhouses, refrigerators, freezers, HVAC systems, laboratory equipment, industrial equipment, etc., for precise temperature control, cooling or heating.What will I get?Digital temperature controller, is in size of :In the package of: Is there any advantages of the product?Accurate temperature measurement, using NTC thermistors to measure temperature, waterproof; LED screen, digital display, can clearly see the measured temperature, easy to useHow to use it?Easy to operate and set, with automatic switching between heating and cooling. When the temperature ≤ the set temperature, the controller will automatically turn on the heating mode, and the Heat indicator light will be on. When the temperature ≥ the set temperature, the heating mode will be turned off. When the temperature ≥ the set temperature, the cooling mode is turned on, and the Cool indicator light is on. When the temperature ≤ the set temperature, the cooling mode is turned off.What should I notice?Please Note : Please select the appropriate size of digital temperature controller