1. The internal backflow design can enable a loudness of up to 300 decibels, allowing users to emit a resounding sound to alert others and providing a certain level of safety guarantee for driving. Our snail horns may help reduce unnecessary harm. 2. Made of ABS polymer materials, it has relatively strong corrosion resistance and the product is waterproof. It may not rust or short - circuit even on rainy days, which can extend its service life and make it more worry - free to use. 3. The unique design of the mounting bracket makes the installation relatively secure, and the bracket has a certain universality. It can be installed in various positions, which only requires a 12V power supply and has low power consumption. 4. There is no bulky air compressor, only a small device that can emit an amazing sound. It is quite compact, and approximately half of the customers may purchase and install two horns to get double the loudness. 5. The train horn is suitable for a wide range of vehicles. Although it is a good upgrade accessory for trucks, our horns are also applicable to SUVs, sedans, boats, and motorcycles.