In some implementations, the flexible edge of the button assembly forms a water tight seal with an edge of the button opening 710 of the front cover plate 708, and prevents water from entering the device housing 702 via the opening 710. In some implementations also in FIGS. 9F, 9G, 11D and 11E, the front cover plate 708 includes a camera opening 712 configured to expose the lens assembly 704. The lens assembly 704 includes a cover glass 705 configured to protect the lens assembly 704. An edge of the cover glass 705 of the lens assembly 704 forms a watertight seal with an edge of the camera opening 712. Alternatively, in some implementations, the front cover plate 708 does not have the camera opening 712, but includes a substantially transparent area 712 that is disposed on top of the lens assembly 704 to allow light e. g. , visible and infrared light to enter the lens assembly 704. In some implementations, the camera opening or transparent area 712 has a size substantially larger than that of lenses of the lens assembly 704. By these means, the camera opening or transparent area 712 of the front cover plate 708 does not become a limiting factor for a margin of a field of view of the doorbell camera 106, and the size of the lens assembly 704 determines the field of view for the doorbell camera 106. Stated another way, the margin of the field of view is limited by physical features of the lens assembly 704, rather than by the camera opening or transparent area 712 of the front cover plate 708.