12V 24V 220V STC-3028 Digital Temperature Humidity Meter LED Dual Display Thermometer Hygrometer Adjustable 0~100%RH 10A Relay Description: Switch the modes between cool and heat; Control temperature by setting the temperature setting value and the difference value; Temperature calibration; Refrigerating control output delay protection; Alarm when temperature exceeds temperature limit or when sensor error. Technical Parameters: Temperature measuring range: -20-80 Celsius Measuring humidity range:00%RH~+100%RH Accuracy: 0.1 Celsius Power supply: DC 12V/DC 24V/AC 110-220V Sensor: NTC sensor Relay contact capacity: Cool (10A/240VAC); Heat (10A/240VAC) Sensor length: 1 meter (include the probe) Shell material:PC and ABS 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 ***''Up 1'' and ''Down 1"' is used for temperature setting button! 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 ***''Up 2'' and ''Down 2"' is used for humidity setting button! Temperature ( hunidity) correction: Pre "up" and "down button at the same time. Package Includes: 1 X STC-3028 lED Dual Digital Thermostat Temperature Humidity Thermometer Hygrometer Cooling Heating Switch Thermostat 1 X Sensor Wiring Method: