Siren system consists of a couple Vortex's/4004's, a boatload of 3016's the county purchased from somewhere in ohio, a couple unknowns, a couple that may be model 5's (used 1/2 mile radius for those) and a couple STH-10's (used 1/2 mile also). If anyone has exact coverage areas for all modern sirens please private message me. I lost the file I had with all of the coverage areas. I used this site http://www.fairfieldema.com/sirens/index.html and google maps for the siren locations. Also if anyone would like the Microsoft streets and trips 2013 file for these and numerous other locations please private message me with your email address. File size is between 1-2 megabites.