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. Power Supply: 230V AC; Output: 16A/230V max. The product comes with a 3m long probe for your convenience. Temperature Control Function with 1% Accuracy Temperature control range: -40~120. Set the start temperature and stop temperature, it will control heating or cooling to work 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 FunctionThis temperature controller socket has cycle timing and countdown functions. You can choose the cycle timer mode to control the device to work 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 the timing function cannot be used at the same time. More Functions5 modes to choose from (temperature control mode, F01 Cycle timer mode, F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF). Large LCD display. Temperature calibration. Reset function. Data storage function that all set parameters can be saved after power off. Wide Range of ApplicationsThis temperature control socket is widely used for greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, refrigerator, home brewing, vivarium, fermentation, heat mat and other temperature-controlled systems. It can also be used as a timer for cycle timing and countdown.