It is specially designed for various heavy‑duty trucks, commercial vehicles, construction machinery and special vehicles, emitting warning alerts during reversing and turning. Adopting a high‑strength metal cavity, the product features robust structure, excellent vibration and shock resistance as well as good sealing performance. It adapts to harsh working conditions including bumpy rides and drastic temperature changes. Easy to install, it delivers loud and clear sound with stable and durable performance to meet vehicle driving safety warning requirements.