Digital Thermostat STC-3028 Temperature Humidity Controller Thermostat Humidistat Thermometer Hygrometer Control Switch 12V 220V STC-3028: 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 Power Supply:110-220VAC 10%, 50/60Hz or DC 12V Temperature Control Range:0C~+80C Humidity Control Range:00%RH~100%RH Accuracy:+/-1C 0.1%RH Relay Capacity:10A/240V AC Integrated sensor:Sense temperature and humidity Heating:Start temperatureStop temperature Humidification:Start humidityStop humidity Long press UP 1 button for 3 seconds, display flashes, press UP or DOWN button to set the start temperature(20C default) Long press DOWN 1 button for 3 seconds, the display flashes, press UP or DOWN button to set the stop temperature (30C default) Long press UP 2 button for 3 seconds, display flashes, press UP or DOWN button to set the start humidity(40%RH default) Long press DOWN 2 button for 3 seconds, the display flashes, press UP or DOWN button to set the stop humidity (60%RH default) Long press DOWN 1 and DOWN 2 button for 3 seconds to reset the controller. Long press UP 1 and DOWN 1 to calibrate the temperature, -10~10 C Long press UP 2 and DOWN 2 to calibrate the humidity _x000D_