Mobile Phone Screen Magnifier Foldable and Portable: The drawer design , not only protects the lens very well, but also better accommodates the mobile phone magnifier, does not take up space. Hight Quality Fresnel Lens: The 3D HD phone screen amplifier is made by top quality Ferne lens instead of the general lens to make the picture more clear. Anti-Blue Light: The 12" 3D HD phone screen amplifier protects eyes from fatigue and myopia. No Battery, Safe and Convenient: Energy saving and environment protected, available anytime, anywhere, you personal theater around.