Feature:1. Wide Application: Our air horn is designed for external use and is available for 1224V 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 AlloyPower: 30WCurrent: 10AOperating Voltage: 12-24VWorking Pressure: 0.8-0.9MPAOperating Frequency: 500-800HZFitment: Suitable for vehicles with air pump sourcePackage List:1 x Horn1 x Pack of Accessory (10PCs)