Privacy Screen Uses A Microlouver Technology That Darkens The Screen View From The Sides (+/- 30 Degrees From Center) - Designed To Fit The M2 And M3 13-Inch Macbook Air And Does Interfere When Closing The Lid - Simply Attach This Reversible Privacy Screen Protector On The Computer Using The Slim Built-In Magnetic Strips - This Laptop Privacy Screen Blocks Up To 51% Of Blue Light - Anti-Glare Matte Side For Environments Prone To Glare And A High-Gloss Side That Helps Retain Color Vibrancy