Startech PRIVCYSCRN23M - Computer monitor privacy screen for security outside +/-30 viewing angle ensures your 16:9 23" widescreen desktop display is confidential. Mount w/ adhesive strips that won't leave permanent residue - Apply the removable monitor privacy filter to monitor bezel w/ side mount tabs or directly to screen for long term use - Relieve eye strain by reducing blue light 30%-40% - Screen protector prevents scratches fingerprints dust - Reversible anti-glare matte or high clarity glossy finish cover