Based off a Gen 1 system at Killian Middle School in Lewisville, TX. However the whole system there is Gen 1, the siren here is technically Gen 3, and the wiring is internal, unlike the external wiring in Lewisville. Red Alert is activated here, but I don't think anyone would want to wait 30 solid minutes or even more for the All Clear signal. After about 24 seconds you can hear the thunder from the lightning strike which triggered this particular siren.
NTXStorms for the audio