The 21-Inch Privacy Screen Protector is designed to protect your sensitive information and your eyes. Made from acrylic, this screen filter prevents unauthorized viewing by limiting the angle at which the screen is visible. Only you can see the content of your monitor, while others will see a darkened screen from an angle. The blue light and anti-glare design reduces strain on your eyes and protects your vision from harmful effects associated with prolonged screen time. Its easy-to-install hanging-frame system requires no tools or adhesives, making it convenient for daily use. Perfect for professionals, students, and commuters, this screen protector fits a wide range of 21-inch monitors and is ideal for use in public spaces, ensuring privacy and comfort wherever you go.