Wolo (808 Challenger DD Chrome Finish Dual Trumpet Horn - 12 Volt, Dual Tone, Roof Mount Roof mounted air horn that will make the perfect addition to any 12-volt truck, RV, van, etc All metal construction throughout to withstand the extremes in all weather conditions and to provide years of dependable service The horns base is painted black enamel and both trumpets have a bright chrome finish, which will dress up any vehicle big or small Installation is made easy with Wolos new flexible inlet hose with brass fittings that is hidden from view The kit includes a heavy-duty compressor, 30-amp relay, hose, stainless steel mounting hardware, flexible inlet hose, wire, electrical terminals, horn button switch and a rubber gasket for a watertight installation