Feature: 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 hornMaterial: 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.. Package List: 1 x Air Horn1 x Rubber Tube1 x Gasket4 x Screw4 x Nut2 x Gas Nozzle