BHT-800 Heating Thermostat for water/gas boiler system FEATURES On Appearance 1.White or Blue backlight will show you a nice world. 2.中 50mm display area helps to protect your eyes. 3.High-transparency acrylic lenses to highlight fashion. 4. Touch buttons to make simple operation. 5. Convenient wall mounting. 6.The visible thickness above the wall is only 20.5mm. 7.White simple design, elegant and fashionable On Functionality 1. Powerful functions are available such as Modbus/WIFI etc. 2.±1℃ Accuracy keeps temperature within the level you set. 3. Data memory when power is off. 4.5+1+1 six periods programmable maximize comfort and economy. 5.Create thermostat group to Centralized control 6. Integrate with Amazon Echo, Google Home. 7. All setting languages synchronize your time zone, address and language. 8. No limit to add rooms and support Smart Scene.