Feature: 1. COMPATIBILITY: Computer monitor protector film is compatible with 23 inch monitors from brands for HP, for Dell, for Acer, for Asus, for ViewSonic. Please confirm the width and height measurement of your computer screen before ordering. 2. PROVIDES CLEAR VISION: Computer screen filter provides you with a clear view of the screen, making it appear dark when viewed from an angle (angle of about 30‑60 degrees) but bright when viewed directly. To change the angle from 60 degrees to 30 degrees, simply adjust the brightness level of the monitor. 3. EYE PROTECTION: Protect your eyes by filtering 96% of UV rays and suppressing 65% of bluelight. This is a reversible screen filter that gives you the flexibility of choosing either a glossy or matte surface, with the matte surface selected to minimize external glare. 4. INSTALLATION: 23 inch monitor screen protector can be completed in about 30 seconds. Two mounting options for your screen protector: 1. Securely attaches to any monitor with clear adhesive strips.2. Removable mounting method, snap in mounting, you can attach or detach as you see fit. 5. APPLICABLE SCENE: 23 inch computer screen protector is perfect for maintaining screen in high traffic areas such as open workspaces, airports, airplanes, trains, coffee shops, office environments, financial institutions, and other public places. Specification: Item Type: 23 Inch Monitor Screen Protector Material: PET Product Size: Approx. 23 inch (509 x 286mm / 20.04 x 11.26in). Package List: 1 x 23 Inch Monitor Screen Protector 1 x Dust Free Cloth 2 x Adhesive Tape 12 x Double Sided Tape Note: Please allow some error due to manual measurement.