The loudness of these air horns for trucks and trains can reach up to 150 decibels. With such a strong sound, it is the most effective and safest way to alert others of your presence. [High Quality Horn] The Air horn has bigger coil, Upgraded Air Compressor, high-quality chrome plated zinc alloy material, stronger air pressure give the air horn louder and more clear warning to other's driving actions. [Strong Durability] Chrome Plated ZINC Trumpet, All-copper coil, and train horns the metal trumpet and compressor are weather , all kits are designed for long time service. [Fit 12 Volt Vehicle] This Air horn fit most cars, Truck, SUV, Motorcycle, Yacht, Boat, off Road Vehicle, Buses etc , also comes with a universal mount that makes the installation easier. [Easy Installation] This Air horn for cars is easy to install with all mounting hardware included. It is flexible and portable, so you can easily detach it from one vehicle to another. Colour:Black Material:Metal Package Contents: 2 x Dual Trumpet Electric Horn 2 x Angle Iron 8 x Screws 8 x Nuts 8 x Gaskets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.