Feature:Reverse parking system will alarm you in several modes when closing to the obstacles, different modes for different distances, help you determine how far between the car and the obstacle. The closer the obstacles, the louder and faster the sound remind. It will avoid any dangerous while reversing.Performance:Parking sensor can be putted separately in front and rear, help you to detect the area that rearview mirrior blind spot, detect pedestrians and low walls, increased the safety for others who happen to be around the moving vehicle, even little and animals.Made of:Made of good quality materials, backup reverse sensor kit is solid, quakeproof, waterproof and dustproof. It increase safety and convenience when driving, and make your parking more easier.