Welcome to our store! 20in Size: Width: 441mm, Height: 248 mm, diagonal: 20 inches, 16:9 aspect ratio, anti-glare, anti-reflective, UV and blue light reduction, protects the monitor from scratches. Application: Ideal for maintaining screen secrets in areas such as open workspaces, airports, airplanes, trains, cafes, office environments, financial institutions and other public places. Secrecy Angle: Computer screen filter makes the screen look dark when viewed from a certain angle (angle of about 3060), but bright when viewed directly. To change the angle from 60 to 30, simply adjust the screen brightness. Effectively obscures secrets when viewed from the side at 30 or more. This feature is only available on the left and right sides. Anti-Blue Light, Eye Protection: Protects your eyes by filtering 96% of UV rays and dimming 65% of blue light. This is a reversible privacy screen filter, available on both sides, giving you the flexibility to choose a glossy or matte side and choose a matte side to reduce external glare. Two Installation Methods: 1. Use the transparent adhesive strip to securely attach to any monitor. 2. Removable snap attachment so you can install or remove as you like. Can be installed in about 30 seconds. Item Type: 20 in Computer Screen Filter Product Material: PET Product Size: 20 inches Aspect Ratio: About 16:9 (441 x 248 mm / 17.4 x 9.8 in) 1 x protective film 1 x dust-free cloth 1 x plastic tower Buckle 1 x double-sided adhesive 1 x user manual Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.