The Storus® SuperHorn™ is the world's loudest breath-powered horn. It never runs out or requires refilling because it uses an unlimited resource...your breath. It is capable of producing a large blast of sound up to 130 decibels. It is great for outdoor activities, camping, hiking, boating, parties, celebrations, sporting events, rallies, protests and more. It is used to get attention, for safety and to scare large animals. It is lightweight and compact.