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. Protects 20.1" widescreen laptop or flat panel monitor from dust, fingerprints, and scratches. Anti-reflective surface reduces screen glare to help prevent eye strain. Easy to attach and remove.