Sonos blog:
Today, getting started with Sonos becomes even easier as we launch Sonos 5.1, a major software update that allows you to set up and run Sonos on your existing WiFi network. From now on, a wired connection to your router – or a SONOS BRIDGE – is no longer required.
That’s a pretty neat update, and it’s going to make Sonos gear far more accessible to use.