Wolo (418 Powerhouse Roof Mount Dual Trumpet Horns - 12 Volt Roof mount air horn that has dual metal chrome trumpets Features Wolos new heavy-duty compact chrome compressor Produces an extra loud alerting sound, ideal for the vehicle owner that demands to be heard Chrome weather protector covers for both trumpets, to ensure years of dependable service Perfect addition for any 12-volt truck, 4X4, RV or SUV