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When smoke is not present, the beam from a light source inside the device travels in a straight line to a detector, but when smoke particles enter, some of the light is scattered and triggers the electrical circuit that sounds the alarm.

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In some implementations, the mounting plate 800 includes a first open slot 802 and a second open slot 804 that are perpendicular to each other.

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What’s worse is that when we tried to contact support they couldn’t help us and told us to delete and re download.

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10C is a block diagram of a doorbell camera system that has a voltage monitoring unit in a doorbell camera in accordance with some implementations. FIG. 10D is a block diagram of a doorbell camera system that has a voltage monitoring unit in a bypass unit in accordance with some implementations. FIG. 10E is a flow chart of a method for controlling a doorbell camera in accordance with some implementations. FIG.

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In some implementations, local storage device 190 is used to store video data when external network conditions are poor.

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