The Deluxe Falcon Commander 4 demonstrates the benefits of superior design and construction. Tested and proven to be the loudest gas powered horn available, the trigger operated Commander 4 features a chrome -plated valve and a polished chrome trumpet. 100% ozone safe, non- flammable. Totally weatherproof with stainless steel diaphragm. Rugged heavy-duty zinc alloy, diecast for extra strength. Meets U.S. Coast Guard recommendations for boats up to 65' (20 meters). Refills are readily available.