300dB Loud Alarm: The horn volume is 300dB. This can sound a warning that cannot be ignored, attract more attention, avoid more accidents on the road, warn other vehicles and pedestrians, and guarantee your safety. Low power consumption, high performance: Our horn has a powerful direct injection micro-compressor and is equipped with a patented screw design, which can truly load and amplify the sound. The speaker uses a low-power 24V DC power supply. An efficient speaker can improve the vehicle's sound quality and produce a clear and loud sound. Universal speaker: Suitable for cars and trucks with DC 24V. The horn is suitable for almost all vehicles. This is the perfect upgrade for, but our horn is also compatible with boats and motorcycles. Robust, durable and waterproof: high-quality ABS material + waterproof shell, solid iron plate, good waterproof performance, can be used without problems even in extreme weather conditions. Easy installation: The train horn is a high-quality, premium train horn kit designed for installation in as many trucks as possible. Everything is integrated into a small but powerful unit! There is no bulky air compressor, just a small unit that produces an incredible sound