personal alarms for seniors
The extended holding structure may be pulled out of the recess hole of the device housing 702 when the device housing 702 slides along a longitudinal direction 812A or a transversal direction 812B, but not when the device housing 702 is pulled by a separation force having a direction perpendicular to a front exterior surface of the device housing 702. Further, the first fastener structure 806 may include a snap fastener configured to lock onto the respective fastener structure 726 of the device housing 702. Once locked onto each other, the snap fastener 806 and the respective fastener structure 726 securely hold the device housing 702 onto the mounting plate 800, thereby onto the wall or doorframe surface to which the mounting plate 800 is mounted. Alternatively, in another example, each of the first and third fastener structures 806 and 808 includes a respective snap fastener configured to lock onto the respective fastener structure 726 or 728. The mounting plate 800 may include an opening 810 configured to let through one or more electrical wires, such as the power supply line and the ground line that can be electrically coupled to the plurality of wire terminals 720 of the doorbell camera 106. In some implementations, in accordance with the process 850 of mounting the doorbell camera 106, the mounting plate 800 is fixed onto an area of the surface where the power supply line and the ground line are located.