【Loud Sound】The buzzer emits a sound of 180 dB while working. And our air horn is louder than other air horns and disperses the sound further. 【Universal and Compatible】Fits any 12V/24V vehicle (car, truck, motorcycle, boat, ATV, bus, etc.). Works in 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. 【Be careful and ensure safety】You don't have to worry about traffic accidents caused by others. This super loud two-tone air horn doesn't have to worry about your car. 【Easy to Install】The air horn is easy to install. It is flexible and portable so it can be easily transported between cars. And strong enough. Need an air compressor (not included).