Specification :Condition : Single TrumpetMaterial : Chrome Plated ZINC Trumpets(Non-Rusting)Package Overall Dimensions : 450x110x99mm / 17.7"L x 4.3"W x 3.9"HTrumpet Length : 430mm / 16.9"Trumpet Bell Width : 95mm / 3.7"DB output : 150 DBVoltage : 12V Feature :-No air system needed .-Easy to fit ， glistening chrome finishing and tuned train horn sound .-This train horn can fit in almost any vehicle ， but deliver the big sound you need .-This horn is the complete package . Fitment :Suitable for cars ， trucks ， boats ， all types autombiles .