Viking Horns 3305/301 Loud 142 Decibles Chrome 3 Trumpet Train Air Horn Kit With 1.5 Gallon Air Tank/air Compressor Sound Output:142 decibels Air Compressor: heavy duty 12 volts 150 PSI Ait Tank Capacity: 1.5 gallo(6 liter) Horn Construction: 3 Metal chrome trumpets FREE horn button included