The loudness of these air horns for trucks and trains can reach up to 150 decibels. With such a strong sound, it is an effective way to alert others of your presence. [High Quality Horn] The air horn has a bigger coil, upgraded air compressor, high-quality chrome-plated zinc alloy material, and stronger air pressure that produces a louder and clearer warning for other drivers. [Strong Durability] Chrome-plated zinc trumpet, all-copper coil, and metal trumpet and compressor components are weather resistant, designed for long-term use. [Fit 12 Volt Vehicle] This air horn fits most cars, trucks, SUVs, motorcycles, yachts, boats, off-road vehicles, buses, and more. It includes a universal mount for easier installation. [Easy Installation] This air horn is easy to install with all mounting hardware included. It is flexible and portable, allowing for easy transfer between vehicles. Color: Black Material: Metal Package Contents: 1 x Dual Trumpet Electric Horn, 1 x Angle Iron, 4 x Screws, 4 x Nuts, 4 x Gaskets. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allows an error of +/- 1-3 cm.