Relay output, easy to use: Plug and play design, just plug the device into this thermostat socket and set the parameters, and it will work according to the programming. Power supply: 120V ± 15% AC; Output: Max. 15A/120V. Temperature control: The temperature controller can automatically switch to heating and cooling models as needed, and control this by adjusting the start and stop temperatures (start temperature > stop temperature for cooling; start temperature < stop temperature for heating). Temperature control range: -40℃~120℃, temperature accuracy: ±1%. This digital temperature controller also supports temperature calibration if needed. Timing function: F01 cycle timer mode; F02 countdown on mode, F03 countdown off mode, F04 countdown on and off mode. You can choose F01 mode to control the device to work in cycles, or choose F02-F04 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 functions cannot be used simultaneously. Other features: NTC 10K temperature sensor probe. Large LCD display. Temperature calibration. Reset function. Data protection function that stores all set parameters after power failure. Wide range of applications: This temperature-controlled socket adapter is widely used for greenhouses, reptiles, incubators, terrariums, freezers, refrigerators, heaters, home brewing, vivariums, fermenters, heat mats, and other temperature-controlled systems. It can also be used as a timer for cycle time and countdown. Temperature calibration: Press and hold the power button for 2 seconds to calibrate the real-time temperature. Temperature calibration range: -9.9 ~ 9.9℃. PC Fireproof material: The exterior uses a new PC fireproof material, durable and wear-resistant, high impact resistance. Safety door: Safety door to prevent hazards from fingers or small objects coming into contact with the device. EU plug: Equipped with EU standard plug, safe to use in Europe and fits all common European sockets.