Item Type: Dual Trumpet Material: Chrome Plated ZINC + Copper Voltage: 12V Volume Output: 150dB Application: Used for modification, replacement, maintenance, refurbishment, decoration and other operation of the original vehicle horn system with wide applicability. Fitment: For truck train ship vans and any 12V vehicle.1The inside is made of high quality metal for maximum strength and durability. Tough enough to withstand the any weather and form of elements of blizzard. You can use anytime anywhere. 2The air horn is a better replacement for any 12 Volt DC power vehicle, such as car, truck, SUV, motorcycle, boat, off road vehicle, buses and so on to meet your needs. 3The premium horn is equipped with good air pump. High?quality air compressor with comprehensive upgrade of motor, enhanced turbine cavity, all copper terminals. 4Unique breathable design, warmth and strength. The air horn is easy to install, flexible and portable, with the reflexes to take from one vehicle to another easily. 5Super?loud 150dB sound can not be ignored, the sound could spread a far distance, please do not use near school or hospital. 1 x Dual Trumpet 1 x Compressor 1 x Hose 1 x Fixed Buckle 5 x Fixed Screw 5 x Nut 5 x Gasket 1 x Manual