Only compatible with the indoor units listed here (see below for compatibility with other indoor units). Displays current temperature and allows you to select a suitable temperature setting. Allows you to select the proper and convenient fan speed in Heating, Cooling, Dry, Fan or Auto. A timer which allows you to set the current time, select sleep time mode, and On/Off Timer setting. Has a function Lock to prevent tampering of settings by children or others. Optional functions: Plasma purification, Auto clean, Smart clean, LCD Luminosity, Electric heater.