This method of forming a mirror-like surface by vacuum-depositing aluminum in a high vacuum state on synthetic resin products such as acrylic or polycarbonate is widely used for advertising signs and other displays. Vacuum deposition is possible in various colors, and a special coating liquid is used to protect the deposition surface after vacuum deposition of aluminum to improve product quality. The back of the indoor reflector is made of ABS material, which makes it sturdy and resistant to distortion due to moisture, and is easy to install outdoors. They are used in indoor spaces such as parking lots, warehouses, hospitals, and factories, and are made of high-strength plastic and acrylic lenses for excellent durability. They provide a maximum viewing angle of 160° and boast a clear reflection effect without distortion. The 360° rotation adjustment function allows flexible use by adjusting to the desired angle. The lightweight design does not burden the installation space, and it is resistant to high temperatures and moisture, making maintenance simple. It effectively prevents accidents between pedestrians and vehicles in narrow hallways or intersections, and its neat design blends well with any environment.