A:Answer It COULD work.. use your 3.5->3.5 headphone cable plugged into this device, instead of your phone. Then your phone connects to the device via Bluetooth. If it’s a permanent setup you might just have the USB cable plugged into a power adapter, too. I use this setup plugged into a stereo receiver, but it could work with your Sonos as long as the Sonos has a 3.5mm input like my receiver does.