function declaration：

Model No: SG-N400a
CPU：Samsung 2440, 400MHZ
OS：WINCE4.2
Function：Navigation/MP3/MP4/picture view/E-book
Support 1-2GB SD card
LCD: 4.0" TFT touch screen
Dimensions: 115mm*80.5mm*15.5mm
Weight: 0.2KG
Pixels: 480*272(RGB)