The monitor privacy screen is easy to attach and remove. Simply attach the 21.5 inch privacy screen to your screen using the attachment strips or slide-mount tabs. This confidentiality screen filter is also reversible. The matte side provides you with glare reduction and the glossy side of the privacy screen will provide you with increased clarity.Protect Your PrivacyThe privacy screen protector for desktop monitors is a great investment if you want to protect your privacy. It is a convenient and cost-effective way to keep your classified information, intellectual property or any other important data you wish to keep protected. You can have a peace of mind while working in the office or public environments because you know your screen is protected with the 30+/- degree privacy viewing angle.Blue Light ReductionThe monitor privacy filter is designed to filter blue light (390nm~480 wavelength) that can cause eye strain and can disrupt sleeping patterns.The Choice of IT Pros Since 1985StarTech.com conducts thorough compatibility and performance testing on all our products to ensure we are meeting or exceeding industry standards and providing high-quality products to IT Professionals. Our local StarTech.com Technical Advisors have broad product expertise and work directly with our StarTech.com Engineers to provide support for our customers both pre and post-sales.The TAA compliant PRIVSCNMON21 is backed by a StarTech.com 2-year warranty and free lifetime technical support.