Privacy screen uses a microlouver technology that darkens the screen view from the sides (+/- 30 degrees from center) - Designed to fit the 2021 and 2023 14-inch MacBook Pro 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