21.5in. Monitor Privacy Screen - Computer monitor privacy screen for security outside +/-30 degree viewing angle ensures your 16:9 21" 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 longterm use - Relieve eye strain by reducing blue light 30 percent to 40 percent - Screen protector prevents scratches fingerprints dust - Reversible anti-glare matte or high-clarity glossy finish cover