(xiang chong ya yingOur 1105DB train horn delivers a very loud sound while being one of the most compact train horns available. The Train Horn is a premium, high quality train horn kit designed for s fit into as many trucks as possible. Train Horn is suitable for almost all vehicles While it's the perfect upgrade for trucks, our horn is also compatible with SUVs, passenger cars, boats, and motorcycles. Made from quality metals and non-oxidizing ABS construction. Simple installation. Discreet and compact black design. Complete water and weather resistance. Loud, clear and deep sound similar to that of a train. Our horn features an extremely powerful direct-injected mini-compressor combined with a patented snail-shaped design to really charge and amplify the sound All integrated into one small but powerful device There is no bulky air compressor, just a small device that produces amazing sound It is so compact that many customers purchase and install 2 horns to overtake volume