house alarm security
, a single LED light, a LED display ring formed around the doorbell button 1002 on a surface of the doorbell housing 708 according to one of a set of predetermined visual patterns input AC voltage. In some implementations, the message may include an audio message broadcast by the speaker of the doorbell camera 106. In some implementations, the camera module 1004 may send to the client device 220 via a short range communication link a notification message indicating that the input AC voltage provided by the transformer 1010 is not sufficient for powering the camera module 1004. More details on the method 1500 implemented by the doorbell camera 106 are explained above with reference to FIG. 10C. Alternatively, in some implementations, at least part of the method 1050 may be implemented at the bypass unit 1012.