The rotating base, fixed bracket, follow-up connecting rod and swing arm are made of CNC engraving aluminum alloy process, and the surface is frosted and anodized. Equipped with stainless steel cover for steering gear, a 9G size steering gear and Y-line parallel steering channel are required to realize steering follow-up function. The steering gear is independently inserted into the receiver channel, and the left and right inspection functions of the roof lights can be independently controlled.