This Dell privacy filter features 3M technology that keeps others from seeing the information on your Dell laptop or Ultrabook screen - without blocking your view. With a 60-degree viewing angle, this filter ensures users directly in front of the screen can see data clearly, but passersby from either side can only see a dark screen. This Dell privacy filter is simple to install thanks to its frameless design and easy-on/easy-off attachment. Its compact size allows you to keep the privacy filter in place, even when you close your laptop. Keep it on to protect your valuable Dell Ultrabook or laptop display from smudges, scratches, and marks. The filter can be safely and easily cleaned - even with many hospital disinfectants.