Whelen WPS 4008-Series-Siren McKinney, TX 560hz 

At 12:05:46 The City of McKinney conducted a test of the Emergency Warning System.
Just a regular-wait not regular test (I'll explain later). This Whelen WPS 4008 adjacent to Aviator Park was a good deal. It went of 5 minutes late and sounded 1 1/2 minutes best possible protection with 560hz. I met up with Jeff, Logan, and Travis to see this monster. After that , we had a 30 minute talk after that. Jeff and I were set up at the siren while Travis and Logan set up at the park some 1000 feet away. Anyways that said, enjoy the video.