1、Anti Blue Light: This computer blue screen protector uses advanced blue light blocking technology to specifically filter blue light with wavelengths between 380‑420nm. Relieve eye discomfort. Meanwhile help you get a better sleep. 2、Material: The protective film is made of high translucent PET material with excellent dust and scratch resistance, effectively preventing the screen from being infested with dust and scratches, keeping your computer screen clear and bright at all times. 3、Compatible: This protective film is compatible for 18.5 inch 16:9 (410 x 231mm) desktop computer screen, suitable for students, OL, gamers and programmers, also suitable for office, home use. 4、Easy to Install: Installing this protective film is very easy, just remove the film on both sides of the protective film after cleaning the display and then apply it. No bubbles will be created during the film application process, so your screen will always be in ideal condition. 5、Anti UV: The protector also filters out 99% of UV rays, providing you with all round security. Whether you use your computer outdoors or indoors, you can enjoy a comfortable digital time. For a wide range of HEV protective applications. Item Type: Blue Light Blocking Screen Filter Film Material: PET Size: 18.5in 16:9 (Approx. 410 x 231mm / 16.14 x 9.09in) Applicable Display Size: 18.5in 1 x Screen Protector 1 x Dust Cloth 2 x Adhesive 12 x Double Sided Tape