... Ebook 3. MP3 , MP4 , Game Player 4. SiRF Atlas-4 Model Number: D-1800Size: 3.5'' GPS Navigation, ... Car GPS, GPS Navigator, Portable GPS- 3.5" Digital screen ... time: 0.1 s FUNCTIONS:1. Voice navigation: route planning, voice reminding, report the road ... visual angle choice, current surrounding search, settings.3. Information of car speed, direction, distance, star ...