Features: 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: Horn Material: Zinc Alloy Speaker Size: Approx. 610mm/24.0in (Total Length) Voltage: DC 12V/24V Current: 4.0A Sound Level: 145dB Operating Air Pressure: 0.3MPa-0.8MPa Applicable Models: Suitable for 12V/24V Vehicles, Such As Semi, Pickup, RV, SUV PackageList: 1 x Electronically Controlled Air Horn 3 x Fixed Screw 3 x Nut 3 x Gasket 2 x Rubber Gasket 1 x Air Nozzle Note: Manual measurement, please allow some errors.