B&O Beolab 3 are active speakers you can connect to any product.
For example: Beosound core, Beoconnect Core, Hall audio, Airport express, Google chromecast, Sonos connect or as simple as Bluetooth.
Connections:
1 x Powerlink
1 x Line – in / via adapter cable
Beolab 3 wall mount
Fits very well with Beolab 11