Keep prying eyes from obtaining private information displayed on your screen with the Privacy Filter For 21.5" Widescreen Monitors from 3M. Whether your display is a flat-panel or curved, you can fit this filter snugly on various 21.5" widescreen monitors. 3M's microlouver technology creates "black out" privacy for anyone outside the 60° viewing angle, keeping your personal information dedicated to your eyes only. Blue light transmission is reduced up to 35%, preventing your eyes from straining during longer sessions. You can easily swap between the gloss side, or the glare-resistant matte side, allowing you to choose your screen preference without degrading picture quality. This durable filter is also touchscreen compatible and protects your display from dust and minor scratches, keeping your monitor in tip-top shape.