Just see LED distance indicator to avoid hidden hazards when backing up, avoid running over things below eye level! This ingenious rear parking sensor helps you avoid hitting things you cannot otherwise see! This car parking sensor system uses 4 sensors to make sure your car is parked in a safe position. The 7 piece rear parking system has a four stage built-in beeping alarm to notify you when you are getting too close. But best of all, this rear parking sensor has a digital distance object indicator with wide-color LED display to show you the exact distance you are from the nearest wall. The reverse car parking sensor trigger activates the system so you can back up without worry. This car parking sensor system is a perfect choice for some demanding drivers who care the safety of their vehicles and life!