Enhance your privacy with the StarTech 21.5-inch monitor privacy screen. This filter ensures your screen content remains confidential by restricting visibility to a +/-30-degree angle from the centre of your 16:9 widescreen display. It also reduces blue light by up to 51% to minimize eye strain. Install this filter easily with residue-free adhesive strips or side mounting tabs. | StarTech 21.5" Monitor Privacy Screen (PRIVSCNMON21)