1. 4.3 inch TFT touch screen, resolution: 480*272. 2. CPU: SAMSUNG S3C2440A-40 400MHZ 3. IC: Sirf StarIII 4. Operating system: WinCE 4.2 5. Storage: internal 64M Nand flash / external SD card 6. Types of operation methods: touch screen 7. Functions: Navigation, MP3, MP4, JPG picture, textbook,calendar 8. Numbers of signal receiver: 20 Channels 9. Precision of Locating:Less than 10m 10. Antenna: with GPS internal Antenna and reserved external GPS Antenna jack 11. Battery: with 1000mAH detachable Nokia battery 12. DV IN: 12V 13. support different country's map as 658 14. with outside speaker (with TMC for choice)