The LensMag from Carson Optical are a 2-pack of high powered magnet Magnifiers for the Samsung Galaxy S4. Included in each 2-pack is a 10x and 15x magnet Magnifier. Simply remove the case from your Samsung Galaxy S4 and place the desired high powered magnet Magnifier over the camera. The LensMag will now act as a macro lens. No glue or additional pieces needed, the LensMag magnetically holds onto your Samsung Galaxy S4 directly. See detail you never though possible with your Samsung Galaxy S4 and the LensMag.