Functional Requirements:

1. Play background music for the entire district to create a leisure environment.

2. Automatic playback of background music: regular, fixed, set the area to play the beautiful background music.

3. Paging radio: community to find someone, play the revelation, release property management notice.

4. Emergency broadcast: fire prevention, in an emergency alarm and reach the evacuation area owners or more concentrated crowd purposes, to ensure that the residential area of personal safety, to avoid accidents.