72532 NARVA HORN AIR TWIN 24VNarva air horns are manufactured using the highest quality materials, all Narva horns are made in Italy and are available in a range of styles, frequencies and decibel ratings. Suitable for use on passenger commercial and leisure vehicles and available in both 12 and 24VTwo tuned notes provide a clear and effective sound. Resin trumpets are suitable for engine compartment installationComprises: High/Low dual air horns, 24 volt electric compressor, universal 24 volt relay & mounting kitFrequency: High: 735Hz Low: 600Hz117dB, 240W absorbed power