1: Embedded SIRF STAR III 20 channel GPS received module,location accuracy is 5 Meter 2: Embedded 1GB SD card ( 2 or 4 optional),the newest official Teleatlas or Navteq maps,with thousands of POI. 3: 4 inch high quality screen,480*272 resolution, for optional visibility,400M CPU,circulated fast and stable. 4: Storage your favorate music or film in SD card.MP3 and MP4,you can enjoy at any time. 5: Support picture view.zoom in & zoom out, Power point, E-book