The 3M ThinkPad X1 and X1 Carbon Touch Privacy Filter, 3M ThinkCentre Edge 91z/92z Privacy Filter, and 3M ThinkPad Helix 4 way Privacy Filter from Lenovo utilize the patented 3M microlouver privacy technology so only persons directly in front of the display can clearly see the image on screen. Passersby, or those viewing from an angle see only a blank, dark screen. With identity theft concerns growing and information disclosure laws becoming increasingly more restrictive, the requirement to protect sensitive data is critical. Unique attachment system keeps the security filter in place even when the laptop is closed. The 3M ThinkPad Helix 4 way Privacy Filter from Lenovo offers privacy in both landscape and portrait orientation within a single solution.