Features:Wifi Temp & Humidity Monitor: wireless thermometer and hygrometer, allows you to easily monitor temperature and humidity in real time from anywhere via mobile phone app.Fast & Accurate Measurement: it equips with high sensitivity sensor, precisely measures temp (-10~55) and humidity (0~99%RH), fast shows measurements on LCD display.Convenient Alert Function: in addition to switch unit (/), read line chart, you can preset temp & humidity threshold with app, receive an alarm immediately at the measurements out of range.Easy Placement: you can effortlessly mount this indoor temperature humidity gauge on wall by adhesive pad, also place it on table, desk, etc., very convenient.Wide Range Of Application: this temp humidity smart sensor, helps to grasp environment condition, fast tackle changes, suitable for bedroom, baby room, office, etc.Specifications:Material: ABS + electronic componentsColor: whiteTemperature range: -10~55Humidity range: 0~99%RHQuiescent current: 75uAAlarm current: 60mALow voltage and undervoltage: 2.2VPower supply: USB power or 2 * 1.5V LR03 battery (not included)Wifi: 802.11b/g/nAlarm sound pressure: 55dBInstallation method: wall-mountedWorking temperature: -10~60Working humidity: max 90%RHItem size: 61*61*27mm / 2.40*2.40*1.06inItem weight: 50g / 1.76ozPackage size: 6.2*6.2*5cm / 2.44*2.44*1.96inPackage weight: 66g / 2.32ozNote:Temp humidity monitor only, others in pictures are not included.Due to manual measurement, there may be deviation.Due to lights or others, it may slightly differ from pictures.Packing List:1 * Temperature Humidity Monitor1 * Adhesive Pad2 * Screw2 * Plastic Expansion Bolt1 * Pin1 * User Manual