Relay output, easy to use: no wires needed, just plug the device into this temperature controller thermostat socket and set the parameters, it will work as programmed. It is CE certified. Power supply: 230V AC; Output: 16A/230V MaxTemperature control function, accuracy 1%: Temperature control range: -40 ~ 120 . Set the start temperature and stop temperature and it will control the heater or cooler to work according to the program. (start temperature is higher than stop temperature, cooling; start temperature is lower than stop temperature, heating). This thermostat outlet also supports temperature calibration.Timing Function: This thermostat outlet has a timing and countdown function. You can choose a cycle timer mode to control the cycle of the appliance, or choose another countdown mode to turn the appliance on or off. Setting range: 0~99 hours and 59 minutes. Please note that the temperature control function and the timer function cannot be used at the same time.More Functions: 5 modes to choose from (temperature control mode, F01 cycle timer mode, F02 countdown mode on, F03 countdown mode off, F04 countdown on and countdown off). Large LCD display. Temperature calibration. Reset function. Data storage function, all setting parameters can be saved after power off. Wide range of applications: This temperature control socket is widely used in greenhouses, reptiles, incubators, terrariums, freezers, refrigerators, heaters, freezers, home brewing, breeding boxes, fermentation, heating pads and other temperature control systems. It can also be used as a loop timer and countdown timer.