Targus Magnetic Privacy Screens are the simple, effective way to protect your on-screen data. They integrate 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.