SUNDELY 12 Volt Black Zinc Alloy Triple Trumpet Air Horn for Car Boat Train Vehicle Motorcycle 12 Volt Black Zinc Alloy Triple Trumpet Air Horn for Car Boat Train Vehicle Motorcycle Overall Dimensions: 11.5"L x 6.0"W x 6.2"H (29.2cm x 15.2cm x 15.7cm), Trumpet Lengths: appr. 11.5" (29.2cm), 9" (22.9cm), 6" (15.2cm), Trumpets Bell Width: appr. 3.54" (9cm) DB output: 150 db (+/-5db), Input Voltage: 12V Colour: Black Main material: zinc alloy