Features: 1.100% brand new and high quality 2.This system is a vehicle assistance device that helps driver lane changing safely during driving. 3.With the aid of 58KHZ Ultrasonic sensor, probe the side / rear of the vehicle for those moving objects into the blind spot of the detection zone. 4.The system works in a set of a control box (controlled by computer), two Ultrasonic sensors, two blind region monitor (or LED light), a buzzer and the wire harness which is the perfect connection of Ultrasonic and computer. 5.There is blind zone at the rear of the vehicle which is easy to endanger driving safety.! When you installed BSM into your lovely car, no matter it's day time, night time or even in the snow,you can be alerted whenever there is a moving object pop into the rear of the vehicle, with the aid of LED lighting on , blinking, buzzer sound so that the driver can be cautious when lane changing to avoid the possibility of side crash accident. 6.When you get ready to get off, open the door,if someone moves behind, it will also give an accurate alarm. Specification: Type:Universal Blind Sport Monitoring System (BSM) Electricity Voltage : 12V Maximum Power : 5W (max) Working Temperature : -40 +85 Storage Temperature : -40 +85 Waterproof level :IP67K Detection Range :0m 5m. Detection Range Accuracy : 3cm Package includes: 1 X Universal Blind Spot Monitoring System Note: 1. All the pictures have been specially coloured, but due to the different lighting conditions and different display settings, there may be some deviations in the pictures and objects you see. Please understand 2. The data are measured by hand, and there may be some deviation, but it does not affect the use.