Falcon Sound Alert Signal HornThe Falcon Sound Alert Signal Horn is a great choice of safety horn where flammability isn't a concern, such as boating and sporting events. This horn uses HFC152a, a propellant that Falcon has been successfully using in their Dust-Off line of products. The Falcon Sound Alert Horn was tested extensively to ensure it would work as effectively as other horns. Features: Meets US Coast Guard requirements for boats up to 65' (20 meters); Provides 120dB blast at 10 feet; Provides up to 58 blasts per can; The propellant used for this horn has a low GWP. ; Propellant is flammable; 6.0 oz can; Refills available;