... Types of operation methods: touch screen, keystroke7. Functions: Navigation, MP3, MP4, JPG picture, textbook, calendar 8. Numbers of signal ... 20 Channels9. Precision of Locating:Less than 10m10. Antenna: with GPS internal Antenna and reserved external GPS Antenna jack11. DC ... , Italian, Finnish, Romanian, simple Chinese, traditional Chinese, English13)13. with outside speaker,BLUETOOTH,FM,AV IN