In addition, the bypass unit 1012 is configured to operate in the second doorbell mode in accordance with a determination that a user press has been applied to the button. In the second doorbell mode, the bypass unit 1012 enables the remote chime 1006 to ring while coupling the doorbell camera 106 to the transformer 1010 e. g. , by the bypass circuit 1012C. Thus, in the absence of any user press on the button 1002, the bypass unit 1012 provides the input AC voltage to the camera module 1004 and bypasses i. e. , a camera scene, and a button top 706 sits on a front surface of the doorbell camera and receives a user press for activating a remote chime device. In some implementations, the device housing 702 is mechanically fixed onto the mounting plate 800 when a first fastener structure 806 located at a front surface of the mounting plate 800 is fastened to a second fastener structure 726 located at the rear exterior surface of the device housing 702. In a specific example, the first fastener structure 806 includes a snap fastener configured to lock onto the respective fastener structure 726 of the device housing 702. The mounting plate 800 may further include a first hole 908. The first hole 908 may be located on or in proximity to the raised edge of the mounting plate 800, allowing a release tool 912 to access the first hole 908 when a flat portion of the rear surface of the mounting plate 800 adheres to the mounting surface.