1. 3.5 inch TFT touch screen (320*240) 2. Samsung 2412 300MHz 3. Operation system: WIN CE 5.0 4. Function: Navigation, MP4/3, Picture browsing, 5. 20 channels 6. Positioning accuracy: 10m 7. Built-in Lithium battery (900mAH, 3 hours working) 8. DC 5V adaptor 9. 2W speaker