Horn voltage:12v Boat horn tone:about 125db Electric horn with an adjustable trumpet stand to prevent vibration Dual trumpet horn suitable for fresh water or salt water environment Marine trumpet horn easy install with provided mounting bracket and screws Stainless steel dual trumpet horn apply to any 12-volt vehicles,trucks,SUVs,RVs and boats The sound of this dual trumpet horn is loud enough for others to clearly hear it at a respectable distance Stainless steel 304 non-magnetic grade trumpet horn with a bright polished finish that will not rust Package 1 x 12v Stainless Steel Electric Dual Trumpet Marine Horn ( Including Rubber Gaskets and Mounting Screws )