TeleType 2852 GPS 20-Channel SiRF III Bluetooth Receiver with US Maps 20-Channel SiRF Star III chipset is WAAS enabled for 3-meter accuracy Connects via Bluetooth to Windows XP or Pocket PC device from up to 30 feet away Features point-to-point voice navigation, multiple routing preferences settings, and Outlook contacts integration Includes street maps for the entire US and Puerto Rico, with marine, aviation and topographic modes Receiver measures 1.75 x 0.8 x 2.8 inches (W x H x D) and is backed by a manufacturer's 1-year warranty