Iv'e had my eye on this siren for awhile and I figured now that school is out it would be the perfect time to do it. This T121 is located at Perry Worth Elementary School and runs 1 minute attack. It is one of 2 121's in the county, the other one is in the village of Thornton. Sirens in Boone County are tested on the 3rd Friday of the month at 12PM.