Siren Tones Wail, Yelp, Manual, Phaser, Airhorn Carson Sirens 5 Year Limited Factory Warranty The Carson siren has been around for decades, just under different names. Carson Sirens manufactured some of the most well known sirens for years and is now offering them under their own name. In business since 1972 and with over 100,000 sirens sold these sirens have proven their dependability and premium sound. The flagship siren SA-400 has a six position rotary switch with push button override. PA override with attached Noise Canceling Microphone. Meets KKK-A-1822C for ambulance. California Title 13 Configurable. Meets class A sound level output.