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In some implementations, the speaker may also adopt a sound input region offset from the speaker openings 718 and a respective hydrophobic membrane to block water intrusion while allowing transmission of sound waves from the speaker openings 718 to the sound input region of the speaker.

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, an entire ring or one or more portions of a ring that can be static or dynamic e. g. , one or more rotating portions of a ring consisting of a single displayed color or two or more different displayed colors. Each of the patterns can conform to a visual language and correspond to a camera status and/or a camera processing operation. For example, a color or a pattern of two or more different colors static or dynamic can indicate that the camera is on or off, has an active or inactive connection to a server e. g. , based on detected control signals and transmission requests. Each of the above identified elements may be stored in one or more of the previously mentioned memory devices, and corresponds to a set of instructions for performing a function described above. The above identified modules or programs i. e. , sets of instructions need not be implemented as separate software programs, procedures, or modules, and thus various subsets of these modules may be combined or otherwise rearranged in various implementations.

 

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Here are a few basic models that are popular on Amazon:First Alert BRK 3120B $27. 18 This hardwired alarm uses both photoelectric and ionization sensors to detect smoke. It does not have a carbon monoxide sensor. First Alert SCO7CN $25. 97 This battery operated model has a photoelectric smoke sensor as well as a carbon monoxide detector. In addition to its siren, the unit can voice warnings and instructions. First Alert P1010 Atom $24. 88 This model uses a photoelectric sensor to detect smoke and is more compact than traditional smoke detectors. First Alert BRK 9120B $9. 81 and Kidde i4618AC $14. 12 These hardwired models detect smoke using an ionization sensor.