Viking Horns V101C-3/1007B Loud 149 Decibels Train Air Horn Kit, With Black Three Trumpet Air Horn, 1.5 Gallon Air Tank, 150 PSI Heavy Duty Air Compressor Sound output: 149 decibels Air Compressor: Heavy duty 12 volt 16 amps, 150 psi Tank Capacity: 1.5 gallons (6 Liters) 3 trumpet metal black color air horn Comes with a FREE horn button