Targus Magnetic Privacy Screens are the simple, effective way to protect your on-screen data. They integrates seamlessly with your MacBook's screen by attaching to the magnets which already built in to the MacBook's frame. No onlookers can view information from either the left or right side of your screen, onlookers only see a dark, unclear screen. On-screen data is only viewable when you are directly in front of the screen. Using a Targus Privacy Screen means you can work productively and comfortably with confidential business information wherever you are, in the knowledge that your on-screen data is protected from prying eyes.