Relay output, easy to use. No wiring required; simply plug the device into this Thermostat Plug and set the parameters, and it will operate as programmed. Power supply: 230V AC; Output: 16A/230V max. The product comes with a 3m long probe for added convenience. Temperature control function with ±1% accuracy. Temperature control range: -40℃~120℃. Set the start and stop temperatures, and it will control heating or cooling to operate as programmed. (Start temperature is higher than stop temperature: cooling; start temperature is lower than stop temperature: heating). This thermostat plug also supports temperature calibration. Timer function. This temperature controller plug has cycle timer and countdown timer functions. You can choose the cycle timer mode to control the device so that it operates 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 timer function cannot be used simultaneously. More Functions: 5 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 screen. Temperature calibration. Reset function. Data storage function so that all set parameters can be saved after power-off. Wide Range of Applications: This temperature control plug is widely used for greenhouses, reptile enclosures, incubators, terrariums, freezers, refrigerators, heaters, fridges, home brewing, vivariums, fermentation tanks, heating mats, and other temperature-controlled systems. It can also be used as a timer for cycle timing and countdowns.