Concrete is a kind of stent. Install the reflector It includes the rearview mirror, mirror stents are installed on the rear car can be observed on both sides of the rearview mirror. In the rearview mirror scaffolds also equipped with rear view mirror, rear view mirror are installed on the stent can be observed on both sides of the rear view mirror, rear view mirror image reflected in the observed in the rearview mirror. Drivers can know about through the rearview mirror, rear side of vehicles, don't look after the front car alight, and convenient installation, can ensure safe driving.