Features 1、Wide Application: Our air horn is designed for external use and is available for 12‑24V power systems, which is very suitable for cars, trucks, boats, trains and etc. 2、Stable Performance: Our 4 trumpets horn is made from stable and tough zinc alloy, and the surface is brightly polished and will not rust, suitable for all weather. 3、Super Loud: This air horn has 4 trumpets and can produce the sound as loud as 150DB. The great sound effect can blare out powerful warning and catch everyone's attention, which is very practical. 4、Durable Serving: This air horn is made to ensure maximum strength and sturdy performance, which is durable and portable. 5、Convenient to Use: The installation process is easy and quick, and the kit includes basic mounting hardwares, no complicated drilling or tools is required, which is both time saving and effortless. Specification Item Type: 4 Trumpets Air Horn Material: Zinc Alloy Power: 30W Current: 10A Working Pressure: 0.8-0.9MPA Operating Frequency: 500-800HZ Fitment: Suitable for vehicles with air pump source Package List 1 x Horn 1 x Pack of Accessory (10PCs)