EG-2 Is a 3 lens Spectacle style magnifier that utilizes a 3 Hardened optical grade acrylic lens system and lightweight comfortable eyeglass frames, and are ideal for small tasks that require magnification and for hands to be free work or just reading and vision enhancement. The optical grade lenses provide a crystal clear dynamic magnified view, magnifications range from 1.5x,2x,2.5x with a single lens, and 3.5x,4x,4.5x when lenses are double up. focal lengths range from 14" to 4" The lenses are prismatic so that the each eye can focus on the object being viewed at the proper distance for magnification being used, thereby relieving eye strain and fatigue. This model has a very bright side mounted led light module that easily pivots so it can aimed for perfect illumination at any given focal length, Comes with lens case and padded zippered unit case for easy travel and storage. USB charging cable provided, can be plugged into any usb charging port, usb charger, computer usb port, cell phone usb charger ( not included).