***** **********Best Quality Guranteed. *****Filter out Blue Light and relieve computer eye strain to help you sleep better. *****Actual Screen Protector dimensions are 21.5 inches measured diagonal, 18.7 inches width x 10.5 inches height. Aspect Ratio 16:09. Please compare your monitor to our measurement picture before purchasing*****Block Blue light at wavelength at 380nm-490nm. *****Easy to apply and remove. This package includes 3 screen protectors and an installation kit. *****Protects screen against scratches and Anti Glare function.