1、BLOCK BLUE LIGHT: The computer blue screen protective film can filter harmful blue light between 380 and 420nm. Advanced blue light blocking technology can protect your eyes, sleep and skin from the negative effects of excessive exposure to blue light 2、SCRATCH PROOF AND DUSTPROOF: Blue light display screen protector is compatible with 23.6in(522x294mm) desktop computer screens and is made of highly transparent PET to effectively prevent screen dust and scratches. Perfect for students, OL, gamers and programmers in the office or at home 3、HEALTHY PROTECTION: With this PC eye protection filter film, you can enjoy your digital time without worrying about eye strain, blurred viewing and headaches. Provide blue blockers for your eyes to protect your health 4、EASY TO INSTALL AND BUBBLE FREE: Very easy to install, after cleaning the monitor just remove the film on both sides of the blue light blocker of the computer screen and paste 5、UV PROTECTION: The screen protector can also filter out 99% of harmful UV rays. To help reduce eye strain, for a wide range of HEV protection