Enjoy a clear screen in brightly lit indoor areas, even near windows, with this anti-glare filter for 23.6" wide-screen monitors (16:9 aspect ratio). It diffuses light so your screen is easier to see in challenging and changing indoor lighting conditions. Behind its simplicity is a powerful combination of optical science and sheer ingenuity you've come to expect from 3M. This anti-glare solution helps protect your screen and improve your view in indoor bright or challenging lighting conditions. Amazing optical technology from 3M diffuses mirrorlike reflections to help keep what's on your screen clear and visible while providing a layer of protection from dust and scratches.