Viking Horns V103C-3/307 Loud 152 decibels Chrome 3 Trumpet Train Air Horn Kit With 1.5 Gallon Air Tank/Air Compresor Sound Output: Loud low pitch at 152 decibels 12 volt 200 PSI, 100% duty cycle air compressor 1.5 gallon air tank (6 liter) Horn Construction: Metal chrome plated base and trumpets FREE horn button included