... to upgrade the map, and update the files of MP3, MP4 and so on.Best service,best price, best choice for ... ;2.6 Support FM transmitter function. The voice of MP3, MP4, navigation can be broadcast to the original car audio playback ... the radar set, refused to interfere with;2.10 MP3 player, MP4 player, multimedia entertainment features.OEM service for radar detector gps is ...