The temperature and humidity sensor can be linked with other smart devices in the home to improve the indoor heating and cooling, and make your home more comfortable.Low advantage design to ensure long-term battery life. Input vollage:DC3V LR03"2 Quiescent current:≤30uA Low power underoltage: ≤2.7V WiFi:802.11b/g/n 2.4GHz Working temperature:-10~55 Working humidity:10%~90%RH How to set up: 1. First scan QR code with your smartphone, or search “Smart Life” app in Google Play Store or APP Store to download and install app. 2. Register the app with email address, then click "Home" "+" on the app interface or click "Add Device". Then select "Sensors" and choose "Temperature and Humidity Sensor (Wi-Fi). 3. There are three ways for user to connect WIFI with sensor: . Bluetooth mode . EZ mode. 3. After connect WiFi successfully, click the sensor icon to enter the app interface and do some setting. You can preset the value of temperature and humidity for alarming from here.