The Mark Levinson № 519 app is the universal remote control for the № 519 audio player. Control source selection, volume, configure all of the settings including network and detailed audio parameters. Access, stream, and listen to any song, from anywhere – streaming music services, shared music library, or anywhere else your music is stored. Tune in to Internet radio stations and podcasts aired from anywhere in the world. And do it all wirelessly, right from your iPhone, iPad, or iPod Touch.