3 in 1 can detect real-time temperature and humidity indoors; light intensity detection helps you feel the environment change. with 'SmartLife' APP, can be easily controlled by mobile APP anytime anywhere.Mini size and appearance, portable and lightweight. Just place it on desktop or mount it on the wall surface.Easy to , can be widely used in living room, bedroom, baby room, office, warehouse, wine cellar, shop, restaurant and more indoor .Intelligent linkage scene: add more than one device in APP by turn, creating intelligent scene to control more flexibly.Specifications:Transmission Frequency: 2.4GHz Wi-FiNetwork Protocol: ZigBee 3.0, IEEE 802.15.4Standby Current: 60.5AWorking Temperature: -10~60 (14~140)Working Humidity: 0~100%Light Intensity Detect Range: 0~157000LuxWi-Fi Distance: 40m (without obstacles)APP Download: with SmartLife Supply: 2 * AA Battery (Not included)Item Size: 84 x 55 x 32mm / 3.31 x 2.17 x 1.26inColour: whiteMaterial: ABSPackage Contents:1 x Temperature Humidity Sensor1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.