Plug and PlayEasy to program and safe to use. Just plug the temperature controller into the socket, then select timing mode, set the start and stop temperature to control the heating or cooling equipment. Temperature control range: -40~120/-72~176. Accuracy: 1%. Output: Max 16A/230V.Heating Cooling Mode The thermostat timer plug will according to the start and stop temperature to control the heating/cooling mode. When the start temperature stop temperature, it will enter the cooling mode; When the start temperature < stop temperature, it will enter the heating mode.Timing Function Thermostat timer socket has timing cycling and countdown function. F01: Cycle Timer mode; F02: Countdown ON mode; F03: Countdown OFF mode; F04: Countdown ON and Countdown OFF mode. Timing range: 0-99 hours 59 minutes.Backlit LCD Various Functions The backlit LCD display of the temperature controller timer can easily realize checking the current and setting temperature value in a dark environment. Besides, it also has calibration, memory, reset and screen lock protection functions to let it more convenient to use.Wide ApplicationThe thermostat timer socket is widely used in greenhouse, home, reptile, incubator, terrarium, refrigerator, vivarium, fermentation and many places where need to control temperature.