【Loud Sound】The air horn will emit 180dB sound while working. And our air horn is louder than other air horns, spread the sound further. 【Universal & Compatible】Fits any 12V/24V vehicle (car, truck, motorcycle, boat, off-road vehicle, bus, etc.). Works for almost all weather conditions, you can use them anytime, anywhere! 【Material】 The air horn trumpets are made of weather-resistant PVC and galvanized metal for durable use. 【Pay attention and ensure safety】 No need to worry about traffic accidents caused by others, this super loud dual-tone air horn does not have to worry about your car. 【Easy to install】 The air horn is easy to install. It is flexible and portable, so it is easy to transport between cars. And loud enough. Need an air compressor (not included).