Still not confident about these horns? They were designed to be mounted on diesel locomotives and be exposed to the elements, snow, ice, rain, wind, and diesel smoke and still sound great! In fact, these horns were designed to be clearly audible from up to 5 miles (calm wind, clear skies). The horns are virtually maintenance free and are designed to be rebuilt with absolutely no tuning necessary.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.