SUNDELY&reg; 24 Volt Chrome Plated Zinc Alloy Quadruple Trumpet Air Horn for Boat Truck Train Car Vehicle 24 Volt Chrome Plated Zinc Alloy Quadruple Trumpet Air Horn for Boat Truck Train Car Vehicle Overall Dimensions: 13.8"L x 6.2"W x 6.6"H (35cm x 15.7cm x 15.7cm), Trumpet Lengths: appr. 13.8" (35cm), 11.5"(29.2cm), 9"(22.8cm), 6.7"(17cm), Trumpets Bell Width: appr. 3.9" (9.9cm) Main material: Chrome plated zinc alloy DB output: 150 db (+/-5db), Input Voltage: 24V, Colour: Silver (Chrome Plated) Suitable for Trucks, Cars, Boats, all Types automobiles and motorcycle