8x Optical Zoom Telescope Telephoto Camera Lens Kit With Crystal Case for Apple iPhone 5 5G This Mobile Phone Telescope is compatible with iPhone 5 and cell phone Optical Zoom: 8X Size: 7.5*2.9cm(L*D) Weight: Approx.110g How to Use: 1). Enclose the telescope on the back shell of the cell phone firstly 2). Adjust the clear focus with your naked eyes 3). It can take pictures while fixing the telescope on the back shell