Description: 1. A pair of universal replacement 12V shell horns. With universal mounting brackets, installation is simple. No additional work is required. Can be used as direct replacement to the snail shell design or round horns.2. Some cars may have a plug fitted to the horn which you need to replace with 2 spade terminals, but in most cases these horns will fit on to your car with nothing else required.Specification:12V Dual Tone Snail Air Horn (1 Pair)110DB Rating: LOW 410HZ HIGH 510HZDimension of single horn (approximate): Diameter:8.5 cm Depth: 7.5 cmFitting instructions includedEasy to installTo be used only for 2 terminals versionSuitable for cars, van, bikes and boats with 12V power supply Package Included: 2 X 12V Air Horn