Privacy filter for notebooks blacks out image to prevent unauthorized viewing from the side. Design helps ensure the privacy of on-screen data on your 15.4" wide-screen notebook. Microlouver technology creates a narrow viewing angle so the image is only visible to those directly in front of the screen. Side view is black. Frameless filter overlays surface for a built-in look and can stay in the notebook when it is closed. Filter also eliminates glare, increases contrast and protects LCD surface from damage.