18.1IN PRIVACY FLT NB LCD BLKO Fellowes Laptop/Flat Panel Privacy Filter with black-out technology darkens screen image when viewed from the side to prevent prying eyes from reading your monitor. On-screen data is only visible to the user in front of the monitor. This product protects 18.1" laptop or flat panel screen from dust, fingerprints, and scratches. Anti-reflective surface reduces screen glare to help prevent eyestrain. It is easy to attach and remove.