https://www.doorbird.com/downloads/datasheet/datasheet_d1101v_surface_housing_en.pdf
Doorbird Intercom D1101V Surface-mounting housing (Backbox)
$100.03
Stainless Steel V2A
(GTIN/EAN: 4260423872592, P/n: 423872592)
Fits only a D1101V IP Video Door Station