Keep your sensitive data private, prevent unauthorized viewing & protect the surface of your 20" LCD monitor with this multipurpose privacy filter. Microlouver technology creates a restricted viewing angle to keep your display visible to only those directly in front of the screen. Side view is black. Higher light transmission offers better visual clarity & increases contrast while eliminating glare to help prevent eyestrain. Aspect ratio is 16:9. Included microfiber cleaning cloth lets you safely wipe down its surface to prevent dust buildup.