Description Features: 102dB super loud, clear and striking, provides a powerful warning, hard to ignore, ensures your driving safety. The reversing horn makes your reversing safer, avoids accidents. Waterproof design, you can use even in bad weather, reliable and long-term protection. Universal mounting bracket with oblong holes, can be mounted anywhere in your heavy vehicle, easy to install. Suitable for trucks, vans, freight cars, trucks and other heavy vehicles. Specification: Voltage: 9-48V Decibel: 102 ± 3dB Material: Plastic and metal Color: Black Package Size: 11.5 * 7.8 * 5cm / 4.53 * 3.07 * 1.97in Package Weight: 254g Package List: 1 * Horn