Privacy filter for LCD monitors blacks out image to prevent unauthorized viewing. Helps ensure the privacy of on-screen data on your LCD monitor. Micro-Louver technology creates a narrow viewing angle so image is only visible to those directly in front of the screen. Side view is black. Protects delicate LCD surface from damage. Eliminates glare and increases contrast. Overlays LCD surface for a "built-in" look. Simple installation. Privacy filter is easily removed.