This product can produce various musical horn sounds.This product is specially applied to various heavy‑duty trucks, commercial vehicles, construction machinery and special vehicles. Driven by air pressure, it generates high‑decibel warning sound for driving alert and signal notification. Built with a high‑strength metal cavity, it boasts robust structure, great vibration and shock resistance and favorable sealing performance, adapting to harsh working conditions such as vehicle bumping and drastic temperature changes. Easy to install, it delivers loud and clear sound with stable and durable performance to meet vehicle safety warning requirements.