https://www.doorbird.com/downloads/datasheet/datasheet_d1101fv50_flush_housing_en.pdf
Doorbird Intercom D1101FV Fingerprint 50 Flush-mounting housing (Backbox)
$175.35
Stainless Steel V2A
(GTIN/EAN: 4260423872455, P/n: 423872455)
Fits only a D1101FV IP Video Door Station