Soundstream NaviBox-1 Plug-n-play small GPS Navigation Box module with Navteq maps Features Touch screen control with compatible head units Plug-n-play easy installation & mounting 2 Gigabyte SD card with all USA and Canada map and 7 million points of interest 8 Meg flash memory, 64 Meg SDRAM 20 parallel receiving channels OS 2.6.x Linux based software 400MHz. processor for fast recalculation times The absolute latest in technology "Sirf Star III chip set" Turn by turn instructions (Male & Female, Southern accent, Urban accent) Choice of Quickest Route or Shortest Route 2-D & 3-D viewing of the maps on screen Including GPS antenna 15 foot A/V interface cable Dimensions: 4.1" x 4.2" x 1