The MiniViewer is a portable video magnifier designed for use by individuals with low vision. It enlarges text or images five, ten, or 15 times on a full color, high resolution liquid crystal display (LCD) screen. It can be used to read catalogs, greeting cards, personal mail, recipes, and menus. Documents can be viewed in full color, high-contrast black-on-white, or inverse white-on-black modes. This portable video magnifier can operate in temperatures from 41 degrees Fahrenheit to 122 degrees Fahrenheit. POWER: Uses 100-240 volts alternating current (AC) or battery pack (optional). OPTIONS: Carrying case. DIMENSIONS (HxLxW): Unit is 2.76 x 4.29 x 6.38 inches; display is 5.75 inches diagonal. WEIGHT: 1.76 pounds. WARRANTY: One year with a 30-day money back guarantee.