1、BLUE LIGHT BLOCKING: Computer blue screen protection film filters harmful blue light with wavelengths between 380‑420nm. The advanced blue light blocking technology protects your eyes, sleep and skin from the negative effects of excessive blue light exposure. 2、UV FILTERS: Screen protectors also filter 99% of harmful UV rays to help reduce eye strain. For a wide range of HEV protection. 3、COMPATIBLE: Laptop screen protector is made of highly translucent PET to protect against screen dust and scratches and is compatible with 24in (Approx. 531x298mm/20.91x173in) laptop screens. 4、EYE PROTECTION: Laptop anti blue light filter film provides a blue blocker for your eyes without worrying about eye fatigue, blurred vision and headaches for students, OLs, gamers and programmers in the office/home. 5、EASY TO INSTALL: Very easy to install, after cleaning the monitor just remove the film on both sides of the computer screen blue light blocker and stick it on, not easy to produce blistering.