Feature: 1. Super Loud Horn: The upgraded internal structure can produce up to 130dB of sound in any weather conditions, allowing you to drive safely. 2. Wide 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. 3. Powerful Compressor: Using larger coil, with stronger air pressure, make the air horn louder and more clearly warning others about their driving behavior. 4. Durable: Chrome plated zinc air horn, copper coil, aluminum alloy horn and weatherproof compressor, all kits are designed for long term use. 5. Simple Installation: The car air horn is easy to install, and it is equipped with a universal mount base to make the installation easier. Specification: Item Type: Air Horn Material: Aluminum Alloy Size: 165mm x70mm(Dia) / 6.5 x 2.8in, 215mm x75mm(Dia) / 8.5 x 3in Volt: DC 12V Current: 20.0A Sound Level: 130dB Operation Air: 0.1Mpa-0.15Mpa Frequency: 530/680Hz. Package List: 5 x Bolt5 x Nut1 x Trigeminal Tube2 x Bracket2 x Horn1 x Air Tube1 x Compressor1 x Relay1 x English Manual