## Page 1 # TECHNICAL DRAWINGS **D2101KV/D2201KV/D2102FV Fingerprint 50/D2202FV Fingerprint 50/D2102FV EKEY/D2202FV EKEY** surface mounting housing (backbox) DoorBird Technology meets Design. > Figure: Photo of the black, rectangular surface-mounting housing/backbox viewed from the front at an angle. The interior is metallic, with mounting tabs, holes, a large circular opening, and smaller fittings visible. > Figure: Technical front-view drawing of the surface mounting housing/backbox. It shows mounting holes, keyhole-shaped mounting slots, dashed centre lines, circular cable openings, and dimension arrows. Readable dimensions: > > - Ø31,00 mm / 1.22 in > - Ø11,00 mm / 0.43 in > - 18,50 mm / 0.73 in > - 70,00 mm / 2.76 in > - □63,50 mm / 2.50 in > - 126,00 mm / 4.96 in > - 125,00 mm / 4.92 in > - 300,00 mm / 11.81 in > - 349,00 mm / 13.74 in > Figure: Technical side-view drawing of the housing, showing a tapered profile. Dimension: 324,69 mm / 12.78 in. > Figure: Technical top/bottom cross-section drawing of the tapered housing. Dimensions: 45,75 mm / 1.80 in and 101,69 mm / 4.00 in. Part of ASSA ABLOY Errors and omissions excepted. | Last update 06/2026 - Copyright © ASSA ABLOY – www.doorbird.com