I built a *second* siren unit, and have photos of them. I'll test them tomorrow afternoon, and have video up in the A/V section.
The newer of the two sirens is located in the loafing shed, where there is a bomb/tornado shelter. The older of the two is located at the main barn, about 750 feet away.
(Siren on Loafing Shed)
(closer view of the same siren head)
(close view of controls @ barn)
(Siren Controls in Barn)
(Siren head at barn)