Feature 1Power Loudness: With 150dB output, the single air horn can be heard miles away, effectively alerting others of your presence, enhancing overall safety and reliability. 2Premium Material: Made of high strength zinc alloy with chrome plating, this horn is waterproof and rustproof, ensuring long term stability and reliability in various environmental conditions. 3Versatile Use: The single trumpet air horn is suitable for 12V 24V train, car, truck, boat, RV, and all types of automobiles, can be installed for replacement and modification. 4Stable Performance: Operating at 0.5Mpa to 0.8Mpa air pressure, this single trumpet horn features a robust build to withstand long term use and high frequency operation. 5Easy Installation: Designed for simple installation in speaker systems, the train single trumpet air horn is a practical and effective way to enhance vehicle safety and visibility. Item Type: Single Trumpet Air Horn Voltage: 12V/24V Size: Approx. 620 x 150mm / 24.41 x 5.91in Current: 4.0A Sound Level: 150dB Operating Air Pressure: 0.5Mpa-0.8Mpa Fitment: Suitable for 12V/24V Train, Car, Truck, Boat, RV, And All Types Automobiles Package List 1 x Single Air Horn 15 x Installation Accessories Note The product itself does not come with an air pump. If you do not have an air pump, you will need to purchase one. When installing the air pump, make sure to remove the original horn on the solenoid valve, and then connect the air nozzle and air pump outlet properly.