The Targus ASF19USZ 19.1" notebook privacy filter is designed to fit 19.1" widescreen laptops. To protect your information, tiny vertical blinds on the surface of the screen narrow the viewing angle so data is only visible directly in front of the monitor up to 45 degrees away from the center of the screen. Onlookers will only see a dark unclear screen when attempting to view the information from a side angle. In addition to providing security, the privacy filter also blocks the glare to help reduce eye strain. The Targus ASF19USZ notebook privacy filter can be easily attached by using clear adhesive strips designed for LCD screens or with the included tab guides that stick to the edge of the LCD screen to hold the filter in place. Users can positio n the tabs so the filter easily slides on and off. Highly portable and easy to use, the Targus ASF19USZ privacy screen protects valuable information on a laptop and LCD monitor from onlookers.