FARBIN Boat horn Waterproof Stainless Steel Dual Trumpet,Electric Horn for 12v Boats Ship Sailboat Yacht Off-Road Vehicle Truck SUV RV Vans Touring Car (Stainless steel double tube, 12V) You need a louder, more powerful, and easy-to-maintain horn. The Farbin Marine Boat Stainless Steel Dual Trumpet Horn Heavy Duty  will definitely fit your need. Th..