The smart motion sensor is designed to detect motion indoors. When the smart motion sensor detects people or animals moving, it will report the information to the users mobile phone immediately. it is very easy to install, users should only paste the smart motion sensor on the wall, download the application and then connect the smart motion sensor to a smartphone via WiFi. Users will know the situation of their houses remotely. The battery life is more than 1 year and the battery is also replaceable.