F01 cycle timer mode; F02 countdown ON mode, F03 countdown OFF mode, F04 countdown ON and countdown OFF mode). Temperature calibration support. Reset function. Data storage function to save all set parameters after power off. This temperature controlled outlet socket has cycle timing and countdown functions. You can select cycle timer mode to control the unit to operate in cycles, or select countdown modes to turn the unit on or off. Setting range: 0-99 hours 59 minutes. Please note that the thermostat plug function and the time function cannot be used at the same time. plug in thermostat function with ±1% accuracy. Set the start and stop temperature to make the heater or cooler operate as programmed. HD LED display with backlight, very convenient to operate in the dark, 2M cable can meet most plug in thermostat needs. This thermostat socket with probe is widely used for glass house, greenhouse,incubator,terrarium, refrigerators, fermentations, heating mat and other temperature controlled systems. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. Voltage: AC100-240V Colour:As Shown Material:Plastic Package Contents: 2x Digital Plug in Thermostat