The Illuminated Smart Magnifier is a hand magnifying lens with light designed for use by individuals with low vision. This hand-held magnifier offers 5x magnification and two white LED lights for reading. It also has a built-in blue UV bulb to help detect counterfeit money. Shine the light on the vertical security strips in paper bills, and If they glow, they are genuine. Detection works on U.S. bills from $5 to $100. POWER: Uses three LR44 button cell batteries (included). DIMENSIONS (LxWxD): 4.75 x 1.5 x 0.3125 inches; the lens measures (LxW) 1.875 x 1.25 inches. WEIGHT: 1.2 ounces.