1. 【Loud Sound】The horn emits a sound of 180 dB when in operation. Our air horn is louder than other air horns and the sound is more diffused. 2. 【Universal and Compatible】It is suitable for any 12V/24V vehicles (cars, trucks, motorcycles, boats, ATVs, buses, etc.). It can work in almost any weather, so you can use it anytime and anywhere! 3. 【Material】The air horn is made of weather - resistant PVC and galvanized metal, which is durable. 4. 【Be Cautious and Ensure Safety】You don't have to worry about traffic accidents caused by others. This super - loud dual - tone air horn will not interfere with your car. 5. 【Easy to Install】The air horn is easy to install. It is flexible and portable, so it can be easily transported between cars. Moreover, it is strong enough. An air compressor (not included) is required.