The features and functions of the Navigon 2100 are controlled via intuitive, easy-to-use animated menus that use predictive text input to quickly and easily select your city, state and address. Maps and menus appear on its extra-large and elegant, high-contrast 3.5-inch, full-color touch-screen display. The 5100 includes a powerful Samsung 400 MHz processor, a fully integrated SiRF Star III GPS chip, 64 MBs of both RAM and ROM built in, and a rechargeable 1,200 mAh lithium ion battery that is rated for 4.5 hours of continuous use. All this is housed in an ultra-thin, sleek chrome housing that weighs only 6.3 ounces, and measures just 4.2 x 3.3 x 0.9 inches (W x H x D). The Navigon 5200 even comes pre-loaded with complete maps of the U.S. and Canada, providing you with superbly accurate, seamless door-to-door directions wherever your vehicular travels might take you. Note that the 2100 runs on the Microsoft Windows CD Net 5.0 operating system. A PC is required to use additional map data, and in such cases users require Windows 2000, ME, XP or higher, as well as a CD ROM drive and a USB port. An SD/MMC card reader is recommended as the 7100 not only uses SD cards, but also comes with a 2 GB SD card in the package.