Features 1、EYE PROTECTION: The computer screen filter filters out harmful blue light at wavelengths between 380‑420nm, and the advanced blue light blocking technology guards your eyes, sleep and skin from the negative effects of blue light overexposure. 2、APPLICABLE: Computer screen filter is compatible with 22 inch (475x297.5mm) desktop computer screens. Perfect for students, OLs, gamers and programmers in their offices and homes. 3、PET MATERIAL: 22 inch computer screen filter is made of highly translucent PET, which can effectively prevent screen dust and scratches for extensive HEV protection. 4、GUARD YOUR HEALTH: 22 inch computer monitor protective film provides you better sleep, blue blocker for your eyes and guards your health. 5、EASY TO INSTALL: The computer screen filter is easy to install and bubble free, after cleaning the monitor just remove the film on both sides of the computer screen blue light blocker. Simply stick it on. Specification Item Type: 22 Inch Computer Screen Filter Material: PET Size: Approx. 475x297.5mm / 18.70x11.71in Package List 1 x Protective Film 1 x Dust Free Cloth 2 x Adhesive 12 x Double Sided Adhesive