MADHOLLY Screen Magnifier 3D HD Non-radiation Eye-protection Lightweight and Portable with Foldable Hold Stand, Enlarge Screen View Enhance Video Quality for All Smart Phones(Black) The magnifier enlarges the view of your cell phone screen. The size will not be a problem any more and you would never stare at a small screen which used to bug you. No need for power. You just need to put your cell phone on one side of the magnifier then you can enjoy the view. It is better to use this product in dark environment. Do not use this under bright lights. 3D movies are accepted. The magnifiers designed for all kinds of videos. Portable and foldable, its the best gift for your friends. Be impressed!