Blacks out screen image when viewed from the side to prevent prying eyes from reading your screen, while keeping a crystal clear screen image from straight-on view Protects screen from scratches and fingerprints and is easy to attach and remove; TAA Compliant Reversible; matte side helps reduce glare and filter is compatible with touchscreen laptops and monitors Privacy filter fits monitors with a diagonal screen measurement of 20. 1\" (viewable area only) and a 4: 3 aspect ratio; Actual dimensions are 16-1/8\" W x 12-1/8\" H Supports compliance with privacy regulations including HIPAA