Features: 1.It can effectively improve the safety of drivers in reversing and parking, and can help increase the safety of passengers, pedestrians, and family members who happen to be around the moving vehicles. 2.With a self?checking system, it can automatically check for abnormal conditions and avoid reversing collisions. The advanced chipset has a wider detection range and more sensitive detection. 3.Provide 4pcs highly sensitive radar sensors, digital LED display number and light, which is very clear. 4.This is a set of vehicle reversing system components, equipped with a drill bit, which is convenient for drilling, installation and operation. 5.The sensor is made of high?quality material ABS, which is sand?proof, dust?proof, waterproof and freeze?proof, and maintains good performance even in harsh environments. Specification: Item Type: LED Parking Sensor Material: ABS Fitment: Universal Working Voltage: 12V DC Rated Working Range: 10.5V-16V DC Current Rate: 100mA-300mA Detection Distance: Approx. 0.3-2.0m/1-6.6ft Ultrasonic Frequency: 40KHz Operating Temperature of The Control Module: -30-80 Wiring: Positive-Red Line Ground Wire-Black Line Circumstance showed below will affect the detecting accuracy: Slippery inclination Slippery ball shape Over-high installatior position Sound absorbed object Special circumstance Special object PackageList: 4 x Parking Sensor with 2.5m/8.2ft Cable 2 x Double-Sided Sticker 1 x Installation Instruction 1 x Drill 1 x Power Cable 1 x Host Control 1 x LED Display Note: Check the functions after installation and then you can use. The speed should less than 5km/h; Different objects have different detecting distance; Heavy rain snow\sensor dirty isensor damaged will affect the detecting results; This product is only for the purpose of assistance and alerting, it will not reduce the responsibility of the driver when there is happened accidence. We will not take any responsibility if there is happened accidence.