Whilst maintaining a crystal clear screen from the front of your monitor, the Fellowes blackout privacy filter has the ability to black out your computer screen from a 30° side angle in order to protect your monitors on screen content simply and easily. This blackout privacy screen features two options for attachment, including double sided adhesive strips and the innovative Quick Reveal Tabs which offer a fast and easy way to remove and reattach your monitors privacy filter when you want to share your screen with colleagues. Not only does the Privascreen privacy filter shield your computers on screen information from prying eyes - the privacy screen also acts as a screen protector, protecting your monitor screen from scratches and fingerprints. To prevent eye strain, the Privascreen blackout privacy filter also features a reversible option, which offers a matte side of the filter that helps to reduce glare on your monitors screen. This privacy screen fits 21.5\" inch monitors with a widescreen aspect ratio of 16:9.