Description Measure Laptop Screen Size Method-- If the visible area of your display has the following dimension Width x Height (Exclude raised/flat Frame and Arrow 1-3mm errors): 13 9/16 x 7 5/8 (344mm x 194mm), then this filter is good for you. Very Important to double check your screens Width and Height excluding Raised or Flat frame before ordering. Its not recommended to make your selection based solely on your screens diagonal size. [Not compatible with MacBooks Series Laptop.] Left Right Dark from the Side-- Note: Not block visibility directly behind you, regardless of distance The privacy filter makes the screen appear dark when looking at it from an angle (left and right 30- 180), but clear when looking directly at it. Please know that when you use this privacy filter, the screen will a little darker than before. To change the privacy levels, simply adjust your monitors brightness level accordingly. Matte Anti-Glare Glossy Enhanced Privacy-- Its a reversible privacy screen, giving you the flexibility to choose glossy or matte finish. The matte side will have less glare, however the glossy side will have stronger privacy Perfect for Open Workspaces-- Privacy work better in brightly light areas, not suggest used in dark light areas, the privacy effect become weak. Two Installation Option-- Option 1 uses clear double side adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that stick to the display frame edge, allowing you to take out the privacy screen filter easily as needed.