Blind spots mirror help eliminates blind spots you can see side mirror. Rectangle shaped mirror adjustable design. Wide angle mirror expand your horizons. Easily mountable on the existing mirror. Mounted on the reflector can effectively eliminate blind spots expand the field of vision to ensure traffic safety. When you stop you can clearly see the lane line with it. Designed to increase visibility and improve vehicle safety. Great for you to replace your damaged auxiliary rearview mirror. Installation Guide: Choose the right position which you want to install on the original rearview mirror. Insert the base of the blind spot mirror into the gap of the rear mirror. Use the screw to fix the blind spot mirror. Adjust the blind spot mirror to the right angle to finish the installation. Please Note: Keep away from fire. Avoid strong vibration do not disassemble refit or repair on your own. Due to the hand measurement there has a size error of about 1-2mm. Due to the difference between different monitors the picture may not be reflecting the actual item please consider this before the purchase.