BLUE LIGHT FILTERING: This computer screen protector filters out harmful blue light with wavelengths between 380–420 nm. Advanced blue light blocking technology protects your eyes, sleep, and skin from the negative effects of overexposure to blue light. WIDE APPLICATION: The screen protector is made of high-translucent PET, effectively preventing dust and scratches on the screen. Perfect for students, office workers, gamers, and programmers in their offices and homes. Compatible with 23.8-inch (528x297 mm) desktop computer screens. EYE PROTECTION: Enjoy your digital time without worrying about eye strain, blurred vision, and headaches. Provides you with a better night's sleep, blue light blocker for your eyes, and protection for your health. EASY TO INSTALL: The computer blue light screen protector is very easy to install. After cleaning your screen, simply remove the film on both sides of the computer's blue light blocker and attach it; no air bubbles. UV FILTERING: The blue light blocking screen protector filters 99% of harmful UV rays to reduce eye strain. Used for a wide range of HEV protection. Item Type: Blue Light Blocking Screen Protector for Computer Screen Material: PET Ratio: 16:9 Product Size: 23.8 inches (528x297 mm / 20.8x11.7 inches) Package Includes: 1 x Protective Film 1 x Dust Cloth 2 x Adhesive Tape 12 x Double-Sided Tape