1Wide Application: Our air horn is designed for external use and is very suitable for marine applications, and it can also be used in other vehicles with 12V Dc power, such as cars, SUVs, trucks and motorcycles. 2Super Loud: Single trumpet can produce sound as loud as 150DB. The great sound effect can blare out powerful warning and catch everyone's attention, which is very practical. 3Reliable Material: Single trumpet is made from stable and tough zinc alloy, and the surface is brightly polished and will not rust, suitable for all weather. 4Durable Serving: This air horn is made to ensure maximum strength and sturdy performance, which is durable and portable. 5Convenient to Use: The installation process is easy and quick, and no complicated drilling or tools is required, which is both time saving and effortless.