Features: The thermostat is only suitable for central air conditioning systems. Beautiful frame creates elegant life. Touch Button makes simple operation. Large screen display with backlight is easy to read, even in the dark. One-touch temp control overrides program schedule at any time. Precise comfort control keeps temperature within 0.5C of the level you set. Data memory when power is off. With the function of detecting floor temperature. 86mm hidden box and European 60mm round box are suitable. C and F are changeable.