This premium display filter protects your onscreen data on notebook & LCD monitors. Micro-Louver technology creates a narrow frontal viewing angle that blacks out side views from prying eyes. Also eliminates glare & increases contrast to reduce eye strain. The innovative overlay design is easy to install & remove. Includes cleaning cloth & mounting tabs. Diagonal Monitor Size: 21.5"; Fits Device Type: Flat Panel Monitor; Frame Type: Frameless; Maximum Antiglare Protection Percent: 99%.