Main Feature 1.The smart brightne thermometer senses the changes in the ambient light,temperature and humidity in real time;Actively report to the user end by Smart Life App as the built-in Bluetooth protocol.A really good complement for body health with the real-time detector of house luminance,temperature and humidity with high precision. 2.Clear data change curve display as day,month and year of luminance,temperature and humidity in App helps monitor the house condition for multiple purposes,as heating control,humidifier and lighting on/off in a preset time for whole house intelligence with infinite sense of wisdom. 3.Remote supervisionof room luminance in App with Bluetooth hub required for high learning efficiency of kids while doing homework with smart scene linkage to house smart switch to turn on the light automatically when the sun goes down or back from whole-day work without manually turning on the light or trigger the switch in app every day for added convenience. 4.An extremely powerful device with mini design for three features all in one,saving money and energy with no need to purchase three different devices for independent use,fits well with smart modern lifestyle with simple operations. 5.A Bluetooth gateway hub is a must for this Bluetooth brightne temperature and humidity sensor when wirele remote control needed,and no hub required when for pairing into App only,featured as the control center for smart homes. Specification Product Name:Smart Brightne Thermometer(Bluetooth Or Zigbee Version) Battery Model:CR2032 button battery Wirele Protocol:Bluetooth Or Zigbee Temperature Measurement Range:0-50 Humidity Measurement Range:0%-99RH% Temperature Accuracy:0.3 Humidity Accuracy:3RH% Light Detection Range:0-999lux Light Perception Range:0.01lux Product Size:66*66*11mm Screen Size:45*45mm Product Weight:45.0g Package Included Thermo-hygrometer*1 User manual*1 Wall sticker*1 Soft magnetic sticker*1