This new Microsoft Surface Laptop 3/ 2/ 1 13.5 inch screen protector is precise cutout, bubble free, friendly touching 9H hardness tempered glass. Most important, it has special coating to filter harmful blue light so as to protect your eyes.Same with HD clear version on 9H hardness, 2.5D round edge, anti smudge coating, the only difference is this one add special coating to block blue light. Weakness: The color of blue light filter glass is with a little blue. If you happend to receive it during night time, the blue color is invisible. Please check the blue version during the day time. About Blue Light: In normal life, most of blue light, visible light wavelength from 400 Nanometers to 700 nanometers, comes from all kinds of screens, cell phones, tablet pc, computers, TVs. Blue light can reach the retina, may cause myopia and excitable brown pigment; If reach your skin, may cause chloasma and freckle. Retinal damage is easier to human?s eyes especially after cataract surgery, blurred vision, visual fatigue caused by VDT syndrome. Blue light blocking tempered glass screen protector is a development of screen protector with special coating, preventing the harm of the blue light. It filters 90% over of 380-420nm blue light and 60% of 420-450nm blue light. Anti-blue light version is with a little blue. Especially under sunshine, the edge is a little blue. And before it put on, it's easier to see the blue color. After you put it on, you can?t almost see the blue color Package Includede: 1x GLASS Screen Protector, Accessories kit Lifetime Warranty: MEGOO devotes continuously to provide the most professional products at prices that everyone can afford.