... -touched control, full hand-writing With built-in antenna, game, calculator, digital photo album, calendar, ... color BacklightAdjustableGPS NavigationGPS moduleBuilt-in main chipGPS external antenna interfaceN/AReceiver frequency1575.42MHz PortCOM1Baud rate4800Track22 TracksGPS ... , average Refurbish Frequency1 time/secondGPS modeModule and Antenna Built In)Environment tempWorking Temp-20-50Storage Temp ...