Dialing button for setting the temperature: The place the finger points to is the current temperature value. ON/OFF Switch for System: Press ON/OFF Key to turn on/off the thermostat. Working Mode Switch: Press HEATCOOL key to switch between heating and cooling modes. Fan Speed Key: L-M-H, that is, Low speed - Medium speed - High speed. MT01 series thermostats are commonly used in commercial, industrial, and residential applications. They can control the fan of air-conditioning systems, water valves, and wind valves. This device helps maintain temperature within the set range and features manual switches for easy operation. Color: White Material: Plastic Package Contents: 1 x Temperature Regulator 1 x English Manual Note: Light and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.