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: 220V AC; Temperature control function with ±1% accuracy Temperature control range: -40°C~120°C. Set start temperature and stop temperature, it will control heater or cooler 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 Function This temperature controller socket has the functions of cycle timing and countdown. You can choose cycle timer mode to control the device to cycle, 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. Wide range of applications This