Benefits: 1, Avoid the blind spots; 2, Clearly when you backing your car. Features: 1. It solves dead angle zone of sight perfectly . 2. Safe parking multi-purpose auxiliary rearview mirror. 3. You can adjust the side stop line accurately. 4. You can adjust the angle of reflection freely. 5. Suitable for installation on rearview mirrors and side mirrors. Installation: 1. Designates the appropriate position. 2. Remove dirt and grease with mild detergent from mirror surface to be installed. 3. Peel off protective film from bottom of blind spot mirror. 4. Adjust the field of vision of the inside auxiliary rearview mirror. Specifications: 100% Brand New And High Quality. Material: A: glass, B: Glass + plastic. Color: as picture. Size: A: sector size: 6*5cm, square size: 6*4.6cm, B: The diameter of the lens is approximately 4.9cm.