The dual-trumpet air horn is designed to provide an incredibly loud sound for your vehicle. Ideal for cars, trucks, and boats, this air horn kit makes you heard in crowded situations. Easy to install, it comes with an integrated design and includes all necessary mounting hardware. Features -Voltage: 12 V -Frequency: 500-800 Hz - : 15 A -Working temperature: -40~80 degree centigrade -Working pressure: 0.3~0.9 -Sound level: 600 -Impedance: 8 -Color:Black -Material:Metal -Size:21.50X15.00X7.10cm/8.45X5.89X2.79in -Note: The section of the main power cable of the relay should be greater than or equal to 2.5 MM. The output cable should be not less than 1.5 MM. The operating of the control relay must be greater than 10 A. -Loud sound: Our dual-trumpet air horn delivers a loud and powerful sound that demands attention, so that you can be heard from a distance -Robust construction: The car air horn is constructed with robust metal, designed to withstand the rigorous use and various weather conditions -Easy installation: Our train horn for car is designed for easy installation. It comes with a complete installation kit, including mounting hardware -Versatile applications: Our train horn is suitable for a wide range of vehicles, including cars, trucks, suvs, motorcycles, boats, and more -Universal compatibility: The air with standard electrical systems and can be easily integrated into your vehicle's existing wiring Package list: 1 x set of air horn kit