Now you can watch YouTube/Movies or for that matter anything in the public places or at your work places and your neighbors have no clue what you are doing! This filter blacks out side view and only the person who is infront of the laptop screen would be able to view the screen and the screen appears as black to neighbors who are peeping in to your laptop. Interesting isn’t it. Try it! Made of imported materials, Using the Microlouver (micro louver) optical technology,and just the person who are in front of the screen can see the information on the screen clearly, also its image is clear, unambiguous, without distortion; as for others who are on both sides, they just can see the black image of the screen, they can not see any information, It is about 45-60 degree anti spy, so it can allow you to use the computer more safe and secure, and protect commercial secrets and personal privacy.