... bad traffic,to express your mood,and in the dark nigt,can make the rear car notice your car clear,and avoid tailgating. This ... computer to charger.6.6.When an emergency accident happen,the led display can flash 5 times per second,to let ... if you think the light is good,we can change the color or add the light beads.2.The controller is in round shape,the radius is 4cm ...