This is my first "decent" siren test recording, as the last two times I tried to record them, the siren either failed or my phone quit recording. I need a camera so bad. Anyways I got this 435hz Vortex today testing in alert and airhorn. All info is in the description of the video. Sorry for the bad quality and tilted tripod, next month's will be better!
https://www.youtube.com/watch?v=oyUw9Hi241s
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