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. Temperature Control Function With 1% Accuracy Temperature Control Range: -40~120. Set Start Temperature And Stop Temperature, It Will Control Heater Or Cooler To Operate As Programmed. (The Start Temperature Is Higher Than The Stop Temperature, Cooling; The Start Temperature Is Lower Than The Stop Temperature, Heating). This Thermostat Socket Also Supports Temperature Calibration. Timing FunctionThis 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. More Functions5 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 Screen. Temperature Calibration. Reset Function. Data Storage Function That All Set Parameters Can Be Saved After Power Off. Wide Range Of ApplicationsThis Temperature Monitor Socket Is Widely Used For Greenhouse, Reptile, Incubator, Terrarium, Freezer, Refrigerator , Heater, Refrigerator, Home Brew, Vivarium, Fermentation, Heating Mat And Other Temperature Controlled Systems. It Can Also Be Used As A Timer For Cycle Timing And Countdown.