Adapter plate for renovating existing mailbox systems with existing intercom grilles. For the loudspeaker unit Art. 1621 and Art. 1621VC. The adapter plate is attached behind the existing intercom grille using the included 3M® adhesive tape. Please ensure that the microphone and the loudspeaker lie flat on the front panel and are positioned in front of the holes. Not to be used with manufacturer-specific universal holders.
