Product Name : Xiaomi Mijia bluetooth wireless temperature and humidity sensorProduct modelLYWSDCGQ/01ZMThe product weight: 43 gThe screen size: 1.78 inchThe temperature range: -9.9 ? ~ 60 ?Humidity range: 0 ~ 99.9%Rated power: 0.18 mWPowered By : Batteries (AAA) x 1How To Install and Use: After Install 'Mi Home'， you need to set using local as "Mainland China"， please do not select other locals.Press the "+" button at the top right corner.Choose the "Add device" option.Choose "Mi Bluetooth Hygrothermograph" and follow the instruction. Package includes:  1 x Xiaomi Mijia Bluetooth Thermometer Hygrometer1 x wall sticker1 x AAA battery1 x use manual( Chinese)The Instruction book only in Chinese. It use with "Mi Home" App (this APP supports Chinese， English， Korean， Russian， Spanish).