Blind spot detection system 12V universal BSD monitoring kit1、Adopts a blind spot detection system featuring one transmitting and multi receiving. 2、IP67 dustproof and waterproof makes it free to work normally under circumstances of poor visibility (such as rain, fog, night). 3、Independent action system with no need to connect OBD. 4、Installed on both sides of the back bumper to ensure invisibility. 5、4-in-1 function: blind spot detection warning（BSD), lane change alert（LCA), rear cross traffic alert（RCTA), door opening warning. 6、LED light will blink and the buzzer will alarm when the turn light is on and there is vehicle in blind spot. 7、After starting the vehicle, BSD system would start-up and LED light will turn on when there is vehicle in blind spot. 8、Widely application and universal for all 12V vehicles.