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There are thousands of different wireless security camera models making it quite difficult to pick just 10.wireless alarm systems
A supply monitoring signal is generated 1056 by the doorbell camera 106 based on the input AC voltage to indicate whether the input AC voltage is greater than a supply threshold. Based on a value of the supply monitoring signal, a user is notified by the doorbell camera 106 as to whether there is sufficient voltage to power the doorbell. In accordance with the supply monitoring signal, a message is presented by the doorbell camera 106 to a user of the doorbell camera 106 to indicate whether the input AC voltage is low with respect to the supply threshold. In some implementations, the message may include a visual message displayed by the LED indicator e. g. , 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.