Easy Flexible MountPretty easy to mount this Car Truck Reversing Warning Alarm Horn, it comes with a bracket and we will send you all the essential accessories you need, universal slotted holes allow you to easily and flexibly mount on most places of any cars; like roof, rear, etc Safe Protective SystemIt is also pretty safe to use this Vehicle Canvas Truck Back Ward Alarm Horn, built-in short cut protection can prevent horn or your car being damaged when wire is wrongly or inversely connected, much safer to use Loud Clear HornThis Universal Car Truck Reversing Warning Alarm Horn has a ultra loud and clear sound, it can produce stable 105DB alarm, which can effectively warn the people at the back of your car when you are reversing and prevent accident Universal High VersatilityThis Loud Clear 105 DB Auto Backup Beeper Warning Alarm Horn is suitable for all DC12-80V vehicles, universal high versatility allows it to be widely used on trucks, buses, vans, fire truck, ambulance, etc. Durable Reliable MaterialThis Vans Truck Back Ward Alarm Horn is mainly made of quality solid nylon plastic material, which has a high hardness, not easy to be broken or damaged, sturdy structure, super stable and anti shock and impact, durable and reliable to serve a long life