MAX Professional 7041 Air Warning Horn Noise Blaster, AH-007-041 (5 oz) Max Professional Air Horn Shoots a powerful blast of noise. Perfect for auto, boat, sporting events and more. Meets U.S. Coast Guard requirements for boats up to 65 feet (20m). Disposable unit. Perfect for auto, boat, sporting events including safety warnings. Carry to the next ball game! For:Coaches Boaters Officials Motorists Lifeguards Hikers Bikers Sports Fans Parties