Features: 1.380?420nm FILTER WAVE RANGE: The monitor screen protector filters out harmful blue light with wavelengths between 380?420nm. Advanced blue light blocking technology protects your eyes and skin. 2.UV PROTECTION: The screen protector also filters 99% of harmful UV rays. To help reduce eye strain. Used for a wide range of HEV protection. Compatible with 23.6/23.8 inch desktop computer screens. 3.SCRATCH RESISTANT: The blue monitor screen protector is made of acrylic, which protects against screen dust and scratches. Perfect for students, OL, gamers and programmers. 4.PROTECT YOUR HEALTH: No need to worry about eye strain, blurred vision and headaches. Provide you with a better night's sleep, blue blocker for your eyes and protection for your health. 5.EASY TO INSTALL AND NO BUBBLES: Easy to install, just remove the film on both sides of the blue light film for your computer screen after cleaning your monitor. Hang the protector on your monitor. specification:Item Type: Protective Film Material: Acrylic Size: Approx. 540 x 320mm / 21.3 x 12.6in Applicable Monitor Size: 23.6in 23.8 inch computer monitor PackageList:1 x ProtectiveFilm 1 x Cleaning Cloth 1 x Dust Free Cloth