The Bang & Olufsen Masterlink/Beolink speaker control system is a proprietary wired network that allows B&O audio/video components to communicate, distributing high-quality sound and system control (from one remote) across different rooms. It connects main systems (e.g., BeoSound 9000) to active speakers (e.g., BeoLab) or link rooms.

Guaranteed to work or money back. This came from a very large purchase of B&O equipment, all of which has worked flawlessly. Although I was unable to test this unit, given the pristine condition of the other B&O items purchased, all of which work great, I expect this will work perfectly as well.