It was in "rummaging" on the net I discovered this device I was looking for months. Coupled with one or more speakers SONOS, you have a REAL wireless hi-fi network. Much music as manageable speakers from your smartphone. The principle: you plug your bridge to your router with Ethernet cable (who comes). You install the included software. You follow the instructions on the screen of your computer. Bridge matter your entire music library in no time. All instructions in the manual attached to BRIDGE. I connected my SPOTIFY account with the Bridge and with astonishing ease. You manage your speakers, your library sound (bass, treble, ...) from your computer (win / apple) your ipad or smartphone using the available SONOS application on the AppStore