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. Direction: 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 filed of vision of the inside auxiliary rearview mirror Warnings: 1) Please take off the pieces and trim strip firstly before installing, then scratch the adhesive off. Select the position and stick it on. Install the pieces and trim strip at last. 2) Do not use it for any reason except its intended function. 3) Please confirm that your wing mirrors' thickness does not exceed 0.315 inches before buying. 4) When washing the car, please do not aim the water gun at the mirror, otherwise the mirror may fall off. Package listing: 1 *Rear view mirror