The Sonos Bridge (formerly known as the ZoneBridge or ZoneBridge BR100) is a wireless bridge that works with all Sonos audio products. The Bridge does not have any audio outputs; instead, it’s just designed to pass wireless signals between Sonos systems.
Simply connect a Bridge to your router using a standard Ethernet cable and then you can add additional Sonos components to your music system wirelessly. Stream music wirelessly to a remote location by placing a Bridge in between a Sonos component in a remote location and the rest of your Sonos system. Also, use a Sonos Bridge to extend the wireless range of your network.
Lastly, the Bridge has a two-port Ethernet switch to bring standard Internet connectivity to your set-top box, DVR, PC, game console or NAS drive.