Features: 1.Super Loud : Super loud 300DB sound. The sound could spread a far distance, please do not use it near school or hospital. 2.Double Tube: The double tube horn is designed for customers looking for a loud and affordable air horn. It is enough for everyday use. 3.Wide Application: Designed for exterior mounting on any 12V 24V vehicles, trucks, SUVs, RVs and boats motorcycles etc. in a fresh or salt water environment . 4.Durable Material: Made of zinc alloy chrome?plated, can work in a variety of temperature environments. Gas tank with stainless steel extends the sound of the horn, protect ears. Tough and long?lasting, no oxidation. 5.Stylish Appearance: Zinc alloy double?pipe horn, stainless steel gas tank, high?quality solenoid valve, aluminum alloy base, lustrous and different appearance, stylish silver, showing you something different. 6.Easy Installation: The air horn is easy to install, it is flexible and portable so it has the reflexes to take from one car to another easily. Specification: Item Type: Air horn Material: Zinc alloy chrome plating Horn diameter: Approx. 90mm/ 3.54in Length: Approx. 400mm/ 15.75in Width: Approx. 170mm/ 6.69in Height: Approx. 110mm/ 4.33in Working Voltage: DC 12V/24V Working Current: 4.0A Sound Level: 300dB Operating Air Pressure: 0.5Mpa-0.8Mpa (air system required) Application: Designed for any 12V 24V vehicles, trucks, SUVs, RVs, boats, motorcycles, etc. in fresh or salt water environments. PackageList: 1 x Air Horn 1 x Rubber Tube 1 x Gasket 4 x Screw 4 x Nut 2 x Gas Nozzle