This loud and compact dual tone air horn has a one-piece design with no hoses needed, and installs in minutes with a single bolt using the factory horn wires. Includes a steel compressor and a high impact resistant plastic camouflage black horn, plus mounting hardware and relay. Side-by-side comparison measured the Air Horn at 139dB compared to the Stebel and Wolo. The Air horn design eliminates the sound loss by attaching the compressor using a bolt on design so the compressor cannot come loose from the sound unit, an intermediary unit is between the sound unit and the compressor allowing for vibration absorbing so sound integrity is not lost. Great fit for truck car dixie ooga golf cart and motorcycle all vehicles with a 12 Volt horn system. Compact Dual-Tone Electric Air Horn Color: Black Sound Output: 139dB (High 510Hz / Low 410Hz) Power Source: 12V (18-25A) One-piece design Maximum rust protection Maintenance free compressor 4-PIN Relay Included Twice as loud as many factory horns No Air Tubes or External Air Supply Needed Specially design for motorcycles but can also be use on any vehicle where space is limited Dimensions: 4-¾" L x 3" W x 4-½" H As for the color of the product connection line does not match the picture, the product itself does not distribute the connection line socket. In order to meet the needs of some customers, the seller gives the connection line socket as a gift. The connection line shown in the picture on the back of the product is the connection way of the car. If the motorcycle is used, the connection socket given by the seller can be used.