SUNDELY Chrome Plated Zinc Alloy Solo Single Trumpet Air Horn 150db 12V for Boat Car Train Vehicle Chrome Plated Zinc Alloy Solo Single Trumpet Air Horn 150db 12V for Boat Car Train Vehicle 12V, 150 db (+/-5db) Made of Chrome plated zinc alloy Overall Dimensions: 17.7"L x 3.9"W x 3.9"H (44.95cm x 9.9cm x 9.9cm)