"Viking Horns" V103C-5/311-1B Super Loud 152 Decibels 3 Trumpet Black Train Air Horn Kit With 3 Gallon Air Tank and 200 PSI 100% Duty Cycle Air Compressor Sound output: 152 decibels Constructione: 3 metal trumpets - in black color Air Compressor: Heavy dury 12 volt 200 psi with 100% duty cycle With 3 gallon air tank (12 liter) Includes a FREE horn button