App is based on Bluetooth Bluetooth control lighting and sound, the main function as follows: 1 Bluetooth connectivity - time to refresh nearby Bluetooth devices! 2 Music Player - Phone song playlists, adjust the volume of the Bluetooth device! 3 control lights - red, green and blue color components based on the color of the color wheel, arbitrary choice! 4 light switch - step control light switch state! 5 AUX - external audio input! 6 USB card broadcasting - U disk audio player! 7 FM FM radio!