7"GPS portable navigator CPU:SAMSUNG 2440A OS: WINCE 4.2 GPS Module: Sirf Star III 3) Compatible with MP4 players, MP3 players and digital entertainment systems 4) GPS: Short satellite acquisition time 5) High-precision positioning: Voice navigation function 6) Built-in antenna and external antenna interface 7) Receive satellite signals even under bad conditions 8) Easy to achieve positioning and navigation functions 9) Color TFT display: High-resolution and clear images 10) Touch-screen, easy to operate 11) Supports SD card 12) Built-in loudspeakers 13) Changing E-map easily with upgrading function