Product Review

This Microsoft Surface Book 13.5 inch screen protector is made of premium tempered glass, with special coating to filter harmful blue light. It protects surface book from normal usage and protects your eyes.

What's the difference between HD clear version and Blue Light Filter Version?
The shiny surface of Blue Light Filter glass is special coating to filter blue light. It reflects light when under sunshine. The color is with a little blue.
Blue Light Filter version is suitable for the people who long time use surface to work, and eyes are easy to get tired. It will protect your eyes. It is not suitable for people who need to use surface outdoors, and are very sensitive on color and clarity. 

About Blue Light
Visible light wavelength from 400 Nanometers to 700 nanometers, comes from all kinds of screens, cell phones, tablet pc, computers, TVs. 400-450 is blue light.
Blue light can reach the retina, may cause myopia and excitable brown pigment; If reach your skin, may cause chloasma and freckle.
Blue light filter tempered glass 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.  

Package Includede:  
1x GLASS Screen Protector, Accessories kit