[Applicable] To fit perfect on any Truck, SUV, Car, Boat, Or Train, The Trumpet measures 4.1x15.7 inch. [Feature] Will work on any vehicle that has a 12 Volt DC Power available. Our powerful super loud 125DB sound that can not be ignored. The sound is strong, loud and in good . [Material] It is constructed out of Premium High Quality stainless steel material to ensure maximum strength, durability in any weather, and will last for a long time. [A Must-have Item] Its a perfect Horn Kit to get everyone's attention or to deliver the warning needed and your complete peace of mind when driving. [Easy to Use] Maintenance free and does not require a compressor or hoses Specification: Material: Metal Color: Sliver Size: 10.5x40cm/4.1x15.7 inch Power Source: 12V Impedance: 5 Sound Level: 105db Power: 30W Current: 10A Working Temperature: -40-80 degrees Celsius Package Includes: 1 x Single Horn (with Mounting screws)(2 Pack) Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.