Note: Freight costs via Express company have done adjusted greatly, Welcome old and new customers to choose!What is wide angle rear window fresnel lens?A clear wide-angle rear window fresnel lens is a thin flexible negative fresnel lens which adheres instantly with water to the rear window of your vehicle to provides driver a increased angle of full view. The lens enable you to actually see many objects under the rear window you can't not see through inside and outside rear view mirrors.Use the rear window fresnel lens, you can avoid accidents due to the children, pets and other low-lying objects in blind spot behind your vehicle while backing up. The lens can also be applied on a side window for larger vehicles to aviod squeeze accidents.Feature of wide angle rear window fresnel lens* Easily applied and removed by using water only.* Easy installation on rear window of your vehicle.* No tools required.* Need no adhesive, just use water only* The lens is better working for vertical rear windowsHow to install?* Apply the quality lens to the inside of the rear window near the botton edge.* Make sure window is clean, then wet it with water* Apply smooth side of lens on the inside of window* Remove air bubbles from the lens* Hold firmly in place for a few seconds.* The lens will turn crystal clear until be peeled off.