Feature: Be able to control temperature and humidity at the same time. Be able to connect with humidifier and dehumidifier equipment at the same time. Be able to connect with refrigeration/ heating and humidifier/dehumidifier equipment at the same time. Heating/Cooling function could be set separately for refrigeration and heating to protect temperature controller from violent change. Same as humidity Control. Supporting Temp and Humidity Calibration Dual Display Window,Be able to display measured temperature/humidity and set temp/humidity at the same time Specification: Model: STC-3028 Input voltage: AC110~220V, DC24V, DC12V Measuring temperature range: -50+110 Measuring humidity range: 00%RH+100%RH Accuracy: 1, 0.1%RH Relay output contact capacity: 10A/240VAC Shell material: PC + ABS fireproof Sensor length: 1m Set startup temperature( humidity ): Pre the "up" button once to display the starting temperature( humidity ). Long pre the "up" button for about 3 seconds,The required temperature( humidity ) can be set by the up and down keys Set the stop temperature( humidity ): Pre the "down"button once to display the stop temperature( humidity ). Long pre the button for about 3 seconds and the stop temperature( humidity ) number flashes. The required temperature( humidity ) can be set by the up and down keys temperature (hunidity) correction : Pre "up" and "down button at the same time. Package includes: 1 X Temperature Humidity Controller