Nautilus Compact Horn - Chrome - Very Loud Air Horn The product is specifically designed and manufactured for custom tuning of medium and large motorcycles or on automobiles particularly suited for visible mountings. It has a sleek Italian design. 139db includes Mount Connector and 12V relay.- The visible face is completely chromed with a professional high quality OEM finish able to resist 400 hours of salt fog exposure. -The product is more water tight than Nautilus Compact in order to better resist high water pressure spray washes inclement weather. -The metal parts are powder painted black. -It is supplied with a 90 degree female connector and a black rubber tube optional to use for installations which particularly expose the product to dust. -Extremely compact one single unit therefore easy to install. -High and Low tone harmonized sound. -115 dB139 dB at 2 metersat 4 inches from the source High Powered Sound more than 3 times 10db the power of a typical single tone OEM factory horn. -High audibility and sound attractiveness that only air horns can guarantee. -Highly reliabledesigned and manufactured to guarantee top performance at temperatures between -30 degrees and 80 degrees centigrade and to pass the function test of at least 50000 on-off cycles. -Box packaging -For other technical characteristics please see the Nautilus Compact technical sheet. Note: We strongly advise the consumer to follow in detail the suggestions and requirements of installation in order to insure the correct function and performance of the product.Homologated CEE ECE and Electromagnetic Compatibility.