Feature:1. Shiny Appearance: Polished and shiny chrome plated speakers, they have an eye catching appearance when installed on any vehicle, playing a decorative role.2. 145dB Sound: Super loud electric horn, designed with 145dB super loud sound level, marine grade small air horn, with electric valve, flat bottom.3. Wide Applicability: Wide applicability, suitable for cars, vehicles, motorcycles, yachts, boats, SUV, bicycles, buses, pickup sea vessels, etc.4. Easy to Install: The horn kit has an electric valve and a flat bottom, including basic installation hardware, easy to install.5. Durable: It is made of zinc alloy material to ensure maximum strength and durability to achieve long term service life.Specification:Item Type: HornMaterial: Zinc AlloySpeaker Size: Approx. 610mm/24.0in (Total Length)Voltage: DC 12V/24VCurrent: 4.0ASound Level: 145dBOperating Air Pressure: 0.3MPa-0.8MPaApplicable Models: Suitable for 12V/24V Vehicles, Such As Semi, Pickup, RV, SUV.Package List:1 x Electronically Controlled Air Horn3 x Fixed Screw3 x Nut3 x Gasket2 x Rubber Gasket1 x Air NozzleNote:Manual measurement, please allow some errors.