Hello I have here a video of a 508 I recorded. These were installed a few years back to replace the old system. The siren I recorded is on S Garfield street in Fennimore Wi. The other 508 is near the rail road museum. They test them daily except weekends. The one on Garfield street had to have its siren head replaced not sure why it had to be replaced. Anyway hope you guys enjoy the video
https://www.youtube.com/watch?v=aPi3PCCHv3Q