Viking Horns V103C-6-12/311-1 Loud 170 Decibels 3 Trumpet Train Air Horn System With 200PSI Air Compressor / 5 Gallon Air Tank 3 trumpet, metal chrome plated air horn Extremely loud sound at 170 decibels 12 vol 200 PSI heavy duty 100% duty cycle air compressor With a 5 gallon (18 liter) air tank and 1/2 inch air hose Complete system with electric wires and a FREE horn button included