As the name suggests it is used to make an 'alarm' or noise so as to attract attention to an event or location.
In this video we will demonstrate a simple setup using a wireless receiver, remote transmitter and siren.
Music: https://www.bensound.com
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Please watch: "CCTV Setup LTS 4K NVR pt 5 naming Cameras, Labelling, and Privacy Masks"
https://www.youtube.com/watch?v=rHoX6hFP-bk
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