This product mainly has two basic shapes: snail shape and disc shape. We can supply them with good quality and competitive prices. Recently, we are developing multiply tones auto horn series which can make kinds of Wonderful tones from which you can choose. 1)12V and 24V 2) Space saving 3) Widely apply for various vehicles, such us motorcycles, cars, trucks and boats, etc. 4) Has the function of water proofing.