The release tool 912 may have an extended long apical part that fits into the first hole 908. The release tool 912 can be inserted into the first hole 908 to gain an access to the first fastener structure 806 or the second fastener structure 726 that mates with the first fastener structure 806 when the device housing 702 is mechanically fixed onto the mounting plate 800. The first fastener structure 806 and the second fastener structure 726 are unfastened from each other when the release tool 912 is inserted into the first hole 908 and applies an unlocking action e. g. , a press and a twist on them. In some implementations, a microphone aperture 716 is located on a front cover plate 708 of the doorbell camera 106 to allow sound wave to reach a microphone concealed behind the front cover plate 708.

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For foreign investors considering setting up business in Ireland and existing organisations seeking a more tax efficient corporate base, the benefits of Irish company formation should be given serious consideration.

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Also, you would have another problem of making sure that the batteries were always charged and in working condition.

1. home security surveillance
2. residential home security systems
3. alarm systems for the elderly