Marine Electric Drop in Hidden Horn W/two Grills for Boats . 12v . Five Oceans BC-2650
12V. ELECTRIC DROP-IN HIDDEN HORN INCLUDES BLACK AND WHITE ABS SCREW-IN GRILLS (WATER RESISTANT) Product Features Grill dimensions: 67mm (H) x 125mm (W) Space required for installation: 44mm (H) x 85mm (W) x 92mm (D) (17 ½ ” x 33 ½” x 36 ½”) Loudness: 107 dB(A) at one meter. Mounting holes are 4″ apart