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 of the thermostat. Working Mode Switch: Press HEATCOOL key to switch the heating/Cooling mode. Fan Speed Key: L-M-H, that is, Low speed-Moddle speed-High speed, Wind valve controller does not have this fLJnction. MT01 series of thermostats are usually used on the commercial, industrial and civil constructi ons, which can control the fan coi l of air-conditioning, water valve and wind valveect. It can make the temperature balance in the setting range in the location, and all switches are manual switch. Very simple to manipulate. Colour: white Material: plastic Package Contents: 1 x Temperature regulator 1 x English manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.