1. 3.5 inch TFT touch screen, resolution: 320*240.  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, FM(optional),USB  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 1150mAH built-in rechargable Li battery, can continuously use for about 3.5 hours 12. DC in: 5V 13. Support SD card  14. support ROUTE66 and IGO map NOTE: 1. Above quotation is based on FOB Shenzhen, not including Map and SD card. Pls understand sample price should be USD20 more than regular price. 2. Packing: Factory standard gift box 3.Accessories: home charger 1pcs. car charger 1pcs, cradle base 1pcs, manual 1pcs, warranty card 1pcs,battary 1pcs, earphone 1pcs. Delivery Lead Time : 25DAYS