Yokocen 4-Speakers air horn is made of chrome zinc material, with all copper coils. The compressor equipped with it has weather resistant and anti-corrosion coatings, ensuring reliable performance in rain, snow, dust, and extreme temperatures.The system produces an ultra-loud 150dB blast (verified), 3X louder than most stock car horns, ensuring you are heard from extreme distances for maximum safety and presence. Designed for simple DIY setup on most 12V vehicles. Comes with mounting brackets, wiring harness, relay, and detailed instructions. Perfect upgrade for Trucks, Pickups, SUVs, Jeeps, RVs, Motorhomes, yachts, boats, off-road vehicles, buses, etc.If you have excellent hands-on ability and can install our speaker on the drill, then you will have a movable, super loud drill horn.