"The OD-65 MagniFly from Carson Optical is a lighted, fully-adjustable, flexible arm Hands Free Magnifier that attaches to your table-top or can be clamped to most fly-tying vises for convenient Hands Free use. Its large 2x power lens gives you a sharp, distortion-free view and 3.5x power spot lens allows you to see even the finest details with ease. Three super bright LED lights allow for use in low-light conditions. The Magnifly Magnifier operates on 3-AAA batteries (not included) or supplied 4.5v DC adapter. "