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 Model: STC-3028 Input voltage: AC110~220V 10%, DC24V, DC12V Measuring temperature range: -20+80 Measuring humidity range: 00%RH+100%RH Accuracy: 1, 0.1%RH Relay output contact capacity: 10A/240VAC Sensor length: 1m Set startup temperature(humidity): Press the "up" button once to display the starting temperature(humidity). Long press the "up" button for about 3 seconds,The required temperature(humidity) can be set by the up and down keys Set stop temperature(humidity): Press the "down"button once to display the stop temperature(humidity). Long press 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/humidity correction: Press "up" and "down" button at the same time.