Helps reduce glare and mirror-like reflections which makes your screen easier to use in high-glare situations. Designed to fit widescreen desktop LCD monitors with a diagonally measured 21 9/16 viewing screen and a 16:9 aspect ratio. Actual filter dimensions are 18 3/4 wide x 10 9/16 high (477 mm x 268 mm). Easy to apply, removable and re-attachable. No lamination, no bubbles. Lightweight, thin, frameless design. Protects screen against scratches. Attaches with optically clear adhesive strips that can easily be applied and reapplied numerous times. Easy to clean; includes cleaning cloth. Compatible with most touchscreen displays.