Privacy Filter for 13.3-inch Laptops from Dell keep your on-screen data private. The on-screen data is visible with a 60o viewing angle only to persons directly in front of the monitor, passersby only see a dark screen. These privacy filters protect student records from side viewing to enhance the integrity of testing centers. Whether computer users are accessing private information in public, or they are working in high-traffic areas, this Dell Privacy Filter is a vital part of a complete security solution. This Filter is easy to install thanks to its frameless design and its compact size allows you to keep the privacy filter in place, even when you close your laptop. Moreover, it protect your valuable Dell Ultrabook or laptop display from smudges, scratches and marks.