Sentry 3V8-H-B Siren Test | Alert | Hidden Valley Lake, CA

[@J2.577]

When does it test

[@Kerk.714]

Man how do you make some pretty awesome videos!

[@thatonefresnorailfan]

Do you know why Hidden Valley has so many Sentries? Do they have some type of siren system up there for some reason, like for fires possibly?

[@marylandsirensfirebuff9664]

Nice video! I went to a screamer today

[@andy_dc]

battery backup horned system