Wolo (135) Sea Safe Chrome Plated Trumpet Horn - 12 Volt Powerful 12-volt single trumpet air horn 100 percent solid brass with a bright chrome plated finish Ideal for smaller boats, producing a warning sound equal to larger horns Lexan non-corrosive diaphragm, making it ideal for use in salt or fresh water environments The compressor is heavy-duty, has a bright chrome plated finish and is maintenance free