Usage Tips:BAC-2000 Central Air Conditioning Type Touch LCD Digital 2-pipe Fan Coil Unit Room Thermostat, Display Fan Speed Clock Temperature Time Week Heat etc.1. It is a thermostat designed to on off control the fans and valves in air conditioner applications via comparison of the room temperature and setting temperature to achieve the aim of comfort and saving energy. 2. Large LCD display with negative black backlight, easy to read, even in the dark. 3. Modern design similar as a cellphone. 4. Beautiful frame CHROME creates elegant life. 5. Acrylic lens to avoid the finger scratch. 6. Touch Button makes simple operation. 7. Four periods program schedules maximize comfort and economy. 8. One-touch temperature control overrides program schedule at any time. 9. Precise comfort control keeps temperature within 0.5 Celsius Degree of the level you set. 10. Data memory when power is off. 11. Easy installation, suitable for 86mm hidden box and European 60mm round box.