Navigation performance: New features: Flash display(*Swf) and FM Transmit,TMC Moudle,Car back rearview,A way AV IN (CVBS,)electronic dog, GPS module: SIRF III 20 channels Position precision: within 10m, 90% typical Map: N/A Main parameter O/S: Linux Version Screen: 4.3 inch, 65K touch TFT screen Resolution: 480x272pixels Extend parameter Storage: 64MB SDRAM,Option 512-1GB Nano Memory Extend Jack: SD/MMC slot, USB1.1 or 2.0 Appearance Antenna: Built in Product weight: 205G Product size:126.5*25*80.5mm Basic parameter Battery: 1300mA rechargeable battery Other function: built in speaker, stereo headphone output Audio format: WMA9, MP3, WAV Video format: WMV, asf, avi Accessories: Bracket, Power adapter, Car adaptor, Pen, USB cable, Headphone, User manual,warranty card.