Plug-and-play design, easy to use. Simply plug in your heating/cooling device, set your desired start and stop temperatures, and let the KETOTEK thermostat plug do the rest. This thermostat plug automatically switches between heating and cooling modes based on your settings and control the device to work. Power supply: 100~250V AC; Output: Max 15A/120V. Temperature control function with ±1℃/±2℉ control accuracy. Wide temperature range: -40℃ to 120℃ (-40℉ to 248℉) with control accuracy of ±1℃/±2℉. Just set Start Temperature and Stop Temperature, then enjoy automated temperature control without complex wiring. For heating mode, set Start Temperature < Stop Temperature; For cooling mode, set Start Temperature > Stop Temperature. Timing function This thermostat plug outlet also has F01~F04 modes for cycle timing and countdown: F01 Cycle Timer mode; F02 CD ON mode, F03 CD OFF mode, F04 CD ON and CD OFF mode. You can choose F01 mode to auto-cycle the device ON/OFF at set intervals, or choose F02~F04 modes to set countdown for device ON/OFF. Set range: 0~99 hours 59 minutes. Please note that temperature control function and timing function cannot be used at the same time. Versatile function This temperature controller outlet plug is equipped with a 3-meter NTC 10K temperature sensor for rapid response, preventing temperature drift. It works in both Fahrenheit and Celsius. The built-in memory function retains the settings in case of power outage. This thermostat plug supports temperature calibration for ultra-precise adjustments. And it has a reset function, ensuring a fresh start whenever needed. Wide Range of Application Made in fire-resistant and durable materials for long-term stable operation, this temperature controller plug is suitable for various applications requiring precise temperature control and management, such as greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fermentation, heat mat, and other temperature-controlled system.