The Sirens in the video go in the order:
-Wail
-Yelp
-Piercer
-HiLo
-Yelp/Piercer/HiLo
Credit for the sounds goes to the Gmod group on steam known as the Photon Lighting group.
(Video will be added as soon as it's up!)

Federal Signal Touchmaster Delta Siren 1.0
The Touchmaster Delta Siren from Federal Signal
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