Are you worrying about the driving safety、 due to the car back-up mirror view is narrow or changing the large-view back-up mirror、 but headache in the expensing maintaining fee. Now this wide angle mirror can help you see your blind spots every time without taking your eyes off of the road. Protect you and your family. Easy stick-on、 rip the sticker off the mirror to apply it your car back-up mirror easily.Wide angle blind spot mirror with mounting tape. Significantly reduces blind spots. As with all convex mirrors、 objects in mirror will be closer than they appear. Optimal placement is on the bottom outside corner of driver or passenger side mirror、 but can be placed in any position for blind spot reduction. It is highly recommended to test positions before mounting with adhesive. Adjustable after placement for a more customizable wide angle view. Installation Guide:Remove dirt and grease with mild detergent from mirror surface to be installed.Peel off protective film from bottom of blind spot mirror.Install firmly on clean and dry mirror surface.Material: ABS and GlassTray Diameter: 53mmGlass Mirror diameter: 47mmSold as a pair.Package Included:2 Pieces Round Blind Spot RearView