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 or 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. Wind valve controller does not have this function. MT01 series thermostats are commonly used in commercial, industrial, and residential applications, capable of controlling the fan, water valve, and wind valve of air-conditioning systems. It maintains temperature within the set range and features manual switches for simple operation. Color: White. Material: Plastic. Package Contents: 1 x Temperature Regulator, 1 x English Manual. Only the items listed are included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.