Our 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 kit designed to fit into as many trucks as possible. It is suitable for a wide range of vehicles and is an ideal upgrade for trucks, as well as compatible with SUVs, passenger cars, boats, and motorcycles. Constructed from durable metals and non-oxidizing ABS material. Features simple installation, a discreet and compact black design, and complete water and weather resistance. Produces a loud, clear, and deep sound similar to that of a train. The horn includes a powerful direct-injected mini-compressor combined with a patented snail-shaped design to enhance and amplify sound. All components are integrated into one small yet powerful unit. No bulky air compressor is required—just a compact device that delivers impressive sound output. Its compact size allows for optional dual installations to increase volume.