Referring to FIGS. 7A and 7B, in this example, the device housing 702 includes an elongated body and two semicircular ends, and the elongated body has a width substantially equal to a diameter of the two semicircular ends. The lens assembly 704 is concentric with a top one of the two semicircular ends, and the button top 706 is concentric with a bottom one of the two semicircular ends. Such physical arrangements not only create a more aesthetically pleasing look for the doorbell camera 106, but also ensure sufficient separation between the lens assembly 702 and the button top 706, thereby avoiding a user press on the button top 706 interfering with video recording of the camera module e. g. , by blocking the field of view of the lens assembly 704. The button top 706 is part of the button assembly, and is configured to receive the user press on the button assembly. The front cover plate 708 therefore includes a button opening 710 configured to expose the button top 706 of the button assembly on the front cover plate 708. The button top 706 has a first diameter that is substantially smaller than a second diameter of the opening 710 of the front cover plate 708. The button top 706 can move vertically in a direction perpendicular to a plane of the button opening 710 e. g.