Bang & Olufsen BEOLINK Handbook page 29

MASTER LINK 25
Incorporation kit for IR receiver
The incorporation kit for the IR receiver is used for invisible installations.
There are two types of incorporation kit.
One for solid walls (order no. 3375187) which consists of a flush-fit socket, a
spacer, a plastic cover (for covering the socket during fitting) and a
decorative ring.
The other kit is designed for partition walls (order. no. 3375188) and consists
of two mounts and one decorative ring.