Docooler?Screen Magnifier Portable 8.2inch 3D HD Movie Video Amplifier for Smart Phone with Stand Folding Eyes Protection Use high definition optics technology in mobile phone screen can be magnified 3 times, the picture clear, dynamic feeling stronger! Products concise and easy, light weight, small volume, to carry, suitable for indoor, camping, travel, leisure etc. Products concise and easy, light weight, small volume, to carry, suitable for indoor, camping, travel, leisure etc. No power supply,energy saving and environmental protection. Suitable for various types of mobile phone.