Usage Tips: 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. While it's an ideal upgrade for trucks, it is also compatible with SUVs, passenger cars, boats, and motorcycles. Made from durable metals and non-oxidizing ABS construction, it features simple installation, a discreet and compact black design, and complete water and weather resistance. It 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 the sound. All components are integrated into one small, powerful unit. There is no bulky air compressor—just a compact device that delivers impressive sound output. Due to its size, many customers choose to install multiple horns for increased volume.