https://www.doorbird.com/downloads/datasheet/datasheet_a8001_en.pdf

Doorbird Intercom Wedge corner wall-mount adapter A8001
$78.15
Polycarbonate
(GTIN/EAN: 4260423867345, P/n: 423867345)
Fits only D1101V and D1102V Surface-Mount IP Video Door Stations
Angle: 7,5° vertical down or up