12V Chrome Air Horns Dual Trumpet Horn Super Loud With Compressor Twin Tone Feature:Loud 、 Twin Tone Sound .Easy to fit 、 glistening chrome finishing and tuned train horn sound .These train horns can fit in almost any vehicle 、 but deliver the big sound you need .They may be small but they pack a punch that can rival any air horn out there . These horns are the complete package . Condition : Dual TrumpetMaterial : Chrome Plated ZINC Trumpets(Non-Rusting)Overall Dimensions : 17.7"L x 3.9"W x 3.9"HTrumpet Lengths : 215mm/165mmTrumpets Bell Width : 3.9"DB output : 150.2 dbVoltage : 12VNote: Install instruction is not included. Professional instruction always recommended.Package Included:1 X Dual Air Horn1 X Compressor1 X Hose