Its 3.5" TFT screen offers 2 levels of magnification - 4X or 8X. Place the magnifier directly on your document and start reading. The display is always in focus. No more searching for the right distance or viewing angle. Viewing modes include positive, negative, and 3 color select options. Unit operates for 2.5 hours on an internal rechargeable battery and recharges in 1.5 hours, or it operates on included power adapter. Unit includes AC adapter and charger, neck strap and carrying case.