Feature 1Super Loud Horn: The upgraded internal structure can produce up to 130dB of sound in any weather conditions, allowing you to drive safely. 2Wide Application: This dual trumpet air horn is suitable for any 12V system vehicle, suitable for most cars, SUVs, motorcycles, yachts, boats, offroad vehicles, buses, etc. 3Powerful Compressor: Using larger coil, with stronger air pressure, make the air horn louder and more clearly warning others about their driving behavior. 4Durable: Chrome plated zinc air horn, copper coil, aluminum alloy horn and weatherproof compressor, all kits are designed for long term use. 5Simple Installation: The car air horn is easy to install, and it is equipped with a universal mount base to make the installation easier.Item Type: Air HornMaterial: Aluminum AlloySize: 165mm x70mm(Dia) / 6.5 x 2.8in, 215mm x75mm(Dia) / 8.5 x 3inVolt: DC 12VCurrent: 20.0ASound Level: 130dBOperation Air: 0.1Mpa-0.15MpaFrequency: 530/680Hz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List5 x Bolt5 x Nut1 x Trigeminal Tube2 x Bracket2 x Horn1 x Air Tube1 xCompressor1 x Relay1 x English Manual