1High Sound Level: Equipped with heavy duty horn system, which can produce a deeper and louder tone, 135dB sound level, loud enough to give warn to other vehicles. 2Strong Air Pressure: With 0.5Mpa?0.8Mpa air pressure, ensure bigger, louder sound, ideal for the modification, replacement, repair of the original horn system. 3Practical: The unique design of the large bend and the sturdy housing can effectively ensure the output of high decibel sound, which is very suitable as a truck horn. 4Complete Accessory: The kit comes with tube and necessary hardwares for easy installation, compact and integrated designed, makes it practical in use. 5Wide Application: This air horn is suitable for all 12V or 24V vehicles, yachts, ships, trains and is also ideal for use as a truck horn, with stable performance.