Smart Phone Screen Magnifier For All Phones Screen Amplifiers Projector.1. This is a mobile phone holder for eye protection, which can enlarge the screen of the mobile phone. 2. This product is suitable for mobile phone models under 7 inch. 3. Designed according to ergonomic principles, fine tuning the operating distance can meet the needs of different users. 4. Abandoning the injection molding technology, it is made of ordinary lenses, and the top Fresnel lens is produced by pressing technology to make the picture