App is used to control our Bluetooth light bar devices. The following functions of the Bluetooth light bar device can be control by this App: 1. Adjust the light color and brightness of the light bar. 2. Control the light mode of the light bar. 3. Synchronize MP3 music files to the sandbox of the app through iTunes file sharing, play MP3 music stored in the sandbox, and flash the lights according to the rhythm of the music. 4. Monitor the sound of music around the phone through the phone microph