The 3M privacy filter from Lenovo utilizes the patented 3M microlouver privacy technology so only persons directly in front of the display can clearly see the image on screen. Passers-by or those viewing from an angle see only a blank, dark screen. With identity theft concerns growing & 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.