Privacy screen uses a Microlouver technology that darkens the screen view from the sides +/ 30 degrees from center Designed to fit laptops with 12.1 16:10 display; Does not interfere when closing the lid Share the screen with someone next to you by flipping the filter up, without removing it completely This laptop privacy screen blocks up to 51 of blue light Use the included adhesive strips or flipup tabs to install the screen protector