363294 Features: 1. Apply to any 12V vehicles2. Using ABS plastic， durable3. Loud and clear sound horn Color: blackMaterial: ABS + metalSmall horn length: about 16cmSmall horn diameter: about 70mmBig horn length: about 21cmBig horn diameter: about 75mmHorn sound level: 135dBFunction:1. Application: 12V vehicles， including cars， trucks， buses， boats， etc.2. Equipped with a relay3. Working current should be higher than 6A2 x Horn (1 long 1 short)1 x Air pump1 x 4pin relay1 x Pipe1 x Accessories kit (2 x installation sheet， 5 x screw， 5 x nut， 1 x adapter)In plastic package