On Appearance 1. 86mm hidden box and European 60mm round box is suitable. 2. Full white appearance, perfectly integrated into your family. 3. LED matrix light, simple display, energy saving, protect your eyes. 4. Touch buttons to make simple operation. 5. The visiable thickenss above the wall is only 12mm. 6. Interlock to connect gives you easy installation. On Functionality 1. 0.5℃ Acuracy keeps temperature within the level you set. 2. Data memory when power is off. 3. 5+1+1 six periods programmable maximize comfort and economy