Roadmax VMAX361 3.5-Inch Portable GPS Navigator Features an easy-to-read 3.5-inch, 320 x 240 LCD touch-control display, voice prompt navigation, and an intuitive interface Includes a foldable, SiRF-enabled, 12 channel GPS antenna; search by address, intersection, or points of interest Offers automatic re-routing and fast route calculation to help minimize delays caused by traffic and other obstructions Dimensions: 4.5 x 3.0 x 1.0 inches (W x H x D); weighs 7.0 ounces Compact and portable GPS system is ready to go right out of the box