X-gps Gps S550hd Mtk 5" Hd 800*480 Gps Navigation,128mb Ram, Bluetooth, Av-in, 4 Gb Au/ Us Map CPU:Media Tek MT3351 GPS module:Media Tek MT3351 SDRAM:128MB SDRAM and 4GB TF-Flash &AV-in & Bluetooth Display:5.0" TFT 800*480 True Color LCD Touch Screen GPS accuracy:Position - Less than 10 meters (33 feet), 95% typical velocity - 0.1 meters per second steady