The Roadmaster Air Horn is a high-volume, attention-commanding blast designed for semi-trucks, commercial vehicles, and enthusiasts who demand to be heard. Featuring chrome-plated metal trumpets and a reliable air compressor, these horns deliver a powerful, typically 120 to 130+ decibel sound (often with a deep "train" or "musical" tone). They are built with durable, corrosion-resistant materials and often include a mounting support arm to dampen vibration for long-lasting performance on the open road.