Targus 4Vu Privacy Filter Screen for 23-Inch Widescreen (16:9 Ratio) Monitors (ASF23W9USZ) Designed to fit 23 inch widescreen LCD Monitors with 16:9 ratio screens Use included adhesive strips to stick the screen to your LCD or use the included tabs that stick to the outside frame of the LCD screen Protects valuable information by narrowing the viewing angle; onlookers see only a dark screen instead of sensitive information Blocks the glare to help reduce eye strain Highly portable and easy to use Limited warranty does not cover products purchased from 3rd party sellers