Features: 1.High Light Transmittance: Compatible with 27inch (659x396mm) for IOS PC. The Bluray Display Screen Protector is made of high light transmission acrylic, which can effectively prevent screen dust and scratches. Perfect for the office home of students, OLs, gamers and programmers. 2.Anti Blue Light And Anti Ultraviolet: Computer blue screen protective film can filter harmful blue light with wavelength between 380?420nm. Advanced blue light blocking technology protects your eyes, sleep and skin from the negative effects of overexposure to blue light. Screen protectors can also filter 99% of harmful UV rays. to help reduce eye fatigue. For broad HEV protection. 3.Reduce Eyestrain: Enjoy your digital time without worrying about eye strain, blurred sight and headaches. Provides you with better sleep, blue blocker for your eyes and protection for your health. 4.Easy Installation: Very easy to install, just remove the film on both sides of the blue light blocker on the computer screen after cleaning the monitor. Hanging the protector on the monitor. No paste, no bubbles. It can also be removed at any time and used on other computers. 5.Multifunctional: Prevents eye fatigue, CVS, chronic eye damage, eye strain, soreness and more serious eye related diseases. specification:Item Type: Blue Light Screen Protector Product Material: Acrylic Applicable To: 27in for IOS PC (659x396mm) Filter Wavelengths: 380-420nm Blue Light (Beneficial Light Is Not Filtered), UV 99% Protection PackageList: 1 x Protective Film 2 x Anti Slip Stickers 1 x Cleaning Bag (Clean Cloth x 1, Wipes x 1, Dust Stickers x 1)