Are you talking about this video? http://youtu.be/_Kqp53S6kuA2T22Bman wrote:A valve? Does it do pulse? I remember a video of a P-15 that looked like it had a damper in the cone.SirenMadness wrote:What's aven more amazing is the fact that the new T135-DC has a slightly better range at only half the motor power! I also noticed it saying the siren can be ordered with a "valve" to do a fire signal. Have any fitted with those been found in the wild?Oldiesmann wrote:Those specs are amazing
Sound range at 70 DB: 9000 feet
Total circular coverage: 9.0 square miles