B&O Beolab 12 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:
2 x Powerlink RJ45
1 x Line – in / with adapter cable
Fits very well with Beolab 2
Fits very well with Beolab 11