HOR Super Sirex No. 15 | 2 min. alert test [Hamilton, OH]

I finally was able to build this in Garry's mod and was able to do a test of it and record it. [Siren model will not go on the workshop]
Enjoy!
[Also you might hear popping after like 1 minute into the test, for some reason my recording software started doing that. just ignore it]

[@Smokealarmlover4]

How did you build this?