Car Horn: Our electric car horn uses the internal reflux design, with the maximum volume up to 150dB. Our truck horn gives out loud voice to remind others when driving, which can avoid unnecessary harm and provide certain guarantee for driving safety.^ Lightweight Loud Electric Truck Horn: Our loud car horn don't have bulky air compressors, only small devices that produce incredible sounds! Combined with snail reflux design, the loudness is up to 150dB. And very light, easy to handle and install.^ High Material Boat Horn: Our boat horn is made of ABS polymer material, which has strong corrosion resistance. It's also waterproof, so you don't have to worry about rusting and short-circuiting even in the rain or while washing your boat.^ Extensive Compatibility: Our 12V boat horn is suitable for almost all vehicles, such as truck and motorcycle. While it's a perfect upgrade for motorcycle, our motorcycle train horn is also compatible with SUV, passenger car, boat and truck.^ High Quality: Our train horn for truck offers the loudest sound, while also being the most compact truck horn. The motorcycle train horn is a high-quality, high-end 12V boat horn designed to integrate into as many trucks as possible. On top of that, the installation process takes less than an hour.