1、COMPATIBLE: This 20-inch computer screen filter is compatible with 20-inch monitors from brands such as HP, Dell, Acer, Asus, ViewSonic, and others. 2、CLEAR VIEW: The laptop filter appears dark when viewing the screen from an angle (approximately 30° to 60°), but bright when viewed directly. To change the privacy angle from 60° to 30° degrees, simply adjust the monitor's brightness. 3、EYE PROTECTION: The computer screen filter protects your eyes by filtering 96% of UV rays and reducing 65% of blue light. It's reversible, giving you the flexibility to choose between glossy or matte surfaces. Choose matte to minimize external glare. 4、SCRATCH PROTECTION: The screen protector offers two mounting options that can be installed in about 30 seconds. It's made of PET material, is anti-glare, and scratch-resistant. 5、APPLICATIONS: The screen protector is perfect for maintaining screen privacy in high-traffic areas such as open workspaces, airports, airplanes, cafes, office environments, financial institutions, and other public places. We are well aware of how important customer service is to our customers, therefore we strive to provide the most thoughtful and prompt service. From ordering to delivery and handling customer service issues, we follow the entire process to ensure that your rights and interests are protected in the best possible way.