Features:-Dual Tone Loudly: The internal reflux design, up to 115DB loudness, gives you a loud voice, and provides a certain degree of safety for driving. Our horn can help you reduce unnecessary injuries.-Design: Long and short double speaker mouth, mixing effect makes the sound travel farther, bright sound, strong penetration, all of which are integrated in a small and powerful device.-Waterproof and Dustproof: Speaker barrel ABS material, strong corrosion resistance,waterproof product,It won't get rusty and circuit short when it is raining.-Wide Compatibility: The Horn is suitable for almost any vehicle! Our horn is compatible for SUVs, passenger cars, boats and motorcycles, etc.-High quality compressor, can be installed without air supply.-In The Box: 1 x Loud Car Horn. 1x Mounting bracket. 4x Mounting screws. 4x Mounting nuts. Specifications:Item name: Electric Air HornColour: silver+blackMaterial: metal+ABSApplicable models: without air pump source vehiclesAir pressure: 0.12mpaVoltage: DC 12V/24V optionalCurrent: 22A/12ASound level: 115db5db Low: 400HZ High: 600HZ Item size: As shownBox: 23.5*9*8.5cm/9.25*3.54*3.34inWeight: 0.98kg/2.16lbNote:01: 12V is suitable for cars, off-road vehicles, minivans, motorcycles with high current; 24V is suitable for large trucks, buses, engineering vehicles and other large cars.02: The car with 1 battery is 12V, 2 batteries in series is 24V, 2 batteries in parallel is still 12V.03: 12V battery with 24V horn will not be able to carry, and vice versa 24V battery with 12V horn will be burned!04: The voltage of battery car is usually not 12V, you need to use voltage converter to turn it to 12V, and the current can be more than 20A. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.