Deep & Powerful! If you love the sound of a classic tugboat storming through the harbor then this horns for you! The Tug-37 horn used for these kits is 4 inches longer than the standard Tug Horn and produces a much deeper bass note.Use this product in a safe and responsible manner, at a distance of at least 100 feet from others.Proper Hearing protection must be worn when using this air horn. Hearing loss or permanent damage may result from unsafe use.Never operate this product in a closed environment or close to pedestrians or others.It is the consumer's responsibility to comply with local noise ordinances and D.O.T. sound level laws.