Relay output, easy to use No wires required, just plug the device into this Temperature Controller Thermostat Socket and set the parameters, it will work as programmed. It has passed CE certification. Power supply: 230 V AC; Output: 16A/230V max. The product comes with a 3m long probe for convenience. Temperature control function with accuracy of 1% Temperature control range: -40~120 . Set the start temperature and stop temperature, it will control heater or cooler to operate as programmed. (Start temperature is higher than stop temperature, cooling; start temperature is lower than stop temperature, heating). This thermostat socket also supports temperature calibration. Timing Function This temperature controller socket has the functions of cycle timing and countdown. You can choose cycle timer mode to control the device to run in cycles, or choose other countdown modes to turn the device on or off. Setting range: 0~99 hours 59 minutes. Please note that the temperature control function and timing function cannot be used at the same time. More functions 5 modes to choose from (temperature control mode, F01 Timer mode cycle, F02 Countdown mode ON, F03 Countdown mode OFF, F04 Countdown ON and countdown OFF). Large LCD screen. Temperature calibration. Reset function. Data storage function that all set parameters can be saved after power off. Wide range of applications This temperature control socket is widely used for greenhouse, reptile, incubator, terrarium , freezer, refrigerator, heater, refrigerator, home brew, vivarium, fermentation, heat mat and other temperature-controlled systems. It can also be used as a timer for cycle timing and countdown. This thermostat with timer can automatically control the switch of refrigeration and heating equipment, and has the function of intelligent control temperature and intelligent timing.