20-Inch Privacy Screen Protector Features: 20-Inch Size: Width: 441 mm, Height: 248 mm, Diagonal: 20 inches, 16:9 aspect ratio, anti-glare, UV and blue light reduction, protects the screen from scratches. Applicability: Perfect for protecting screen secrets in locations such as open workspaces, airports, airplanes, trains, cafes, office environments, financial institutions, and other public places. Privacy Angle: The privacy screen protector makes the screen appear dark when viewed from a certain angle (approximately 30°–60° angle), but bright when viewed directly. To change the angle from 60° to 30°, simply adjust the screen's brightness. Effectively hides 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 suppressing 65% of blue light. This is a reversible privacy screen protector, available on both sides, giving you the flexibility to choose a glossy or matte side, and opt for the matte side to reduce external glare. Two Installation Methods: 1. Use the clear adhesive strip to securely attach to any screen. 2. Removable snap-in mounting so you can install or remove as needed. Can be installed in approximately 30 seconds.