Designed to fit 13.3″ notebooks. Protects valuable information by narrowing the viewing angle; onlookers see only a dark screen instead of sensitive information. Use included adhesive strips to stick the screen to your notebook or use the included tabs that stick to the outsize frame of the notebook screen. Crystal clear screen image from straight-on view Easy to attach and remove with new and improved tabs Helps to reduce glare to help preventing eye strain You’ll see the information on your display while people on either side only see a darkened screen Blocks visibility from side angles outside the 60 degree viewing angle, but not behind you. Helps to protect your LCD panel from scratches and abrasions.