Product parameters: 1. Material: HD acrylic lens + ABS shell material. 2. Product size: 257x170x21mm. 3. Screen size: 12 inches. 4. Product net weight: 270g. 5. Magnification: 3-5 times (the magnification is related to the screen size of the phone). 6. Viewing distance: 1.5-3 meters. 7. Applies to: all mobile phones.

http://olla.gr/f18-12-inch-rotatable-folding-universal-mobile-phone-screen-amplifier-hd-video-amplifier-with-block-light-card-book-shape-version-blue/