Innovera blf150 blackout privacy filter for 15″ laptops helps ensure the privacy of on-screen data on your notebook or lcd monitor. Microlouver technology creates a narrow viewing angle. Image is only visible to those directly in front of the screen; side view is black. It also reduces glare, increases contrast and protects the delicate monitor surface from damage. Overlays monitor surface for a built-in look. Includes microfiber cleaning cloth.