Currently this app controls Dual's Head unit products via Bluetooth.This app controls most of the primary functions of your marine stereo features including: [NOTE : For some models, the Dual iPlug app operates just as a remote controller. ] - Mode change : Radio, USB, Bluetooth, iPod, Aux in - Radio : FM1, FM2, FM3, AM1, AM2 and 7-channel Weather band. Seek/Tune frequencies, Access the preset stations, Store the radio stations etc. - USB input : Playback the music from USB connected to the source unit. Search the songs in music list, ID3 display (Song Title, Artist, Album), Track Up / Down, Play / Pause - Bluetooth : Music streaming, Play / Pause, Track Up / Down, ID3 tag display (Song Title, Artist, Album) - iPod/iPhone/iPad control : Playback the music from iPod/iPhone/iPad connected to the source unit via USB port, Play / Pause, Track Up / Down, ID3 Tag Display - Auxiliary input - Audio control - Zone speaker control (Zone 1, 2, 3) - Preset EQ curves (Pop, Rock, Jazz, Classical, Beat, Flat, User) - Band tone control (Bass/Mid/Treble) *App capabilities vary with the stereo’s feature set.