Screen magnifier size: The total length of the 21-laptop and mobile phone screen magnifier is 19.4 inches (49.3 cm), and the total height is 14.3 inches (36.5 cm). POWERFUL COMPATIBILTY: This mobile phone screen enlarger adopt HD zoom optical technology, Can be applied to laptop/tablet/mobile screen magnifier. General screen magnifier for laptops : This laptop screen magnifier uses high-definition zoom optical technology, which can be applied to laptop/tablet/mobile phone screen magnifiers. The screen magnifier uses high-definition optical technology to magnify 3-5 times on the phone screen. High Quality Materials: The Screen Magnifying glass uses high-definition optical lens material, the wooden frame bracket is environmentally friendly, and can adjust multiple viewing angles. It can enjoy 3D vision away from the screen, effectively preventing mobile phone radiation from harming the human body THE BEST CHOICE FOR GIFTS: Help protect eyes from relatively close viewing distances. The simple and stylish design makes this product the best gift choice for your family, friends, relatives, movie lovers and game playmates. The best gift for the elderly to read books or newspapers