3M's privacy technology narrows the viewing area so that screen data is visible only to persons directly in front of the monitor Privacy Filters will not blur or distort on-screen images. They reduce screen glare, guard against scratches and abrasions to protect your monitor investment. Unobtrusive design will not interfere with LCD speakers or monitor controls. Privacy Filters are easy to attach and remove; filter can be left in place even when your notebook computer is closed. This model is intended for 19" LCD monitors.