Portable Universal Head Unit Car GPS Planet Navigation X20-1Portable Universal Head Unit Car GPS Navigation GPS Navigator for Car Truck Vehicle Motorcycle About this item GPS navigator function makes you travel more convenient and fast Music playes Support WMA9, MP3 and WAV, AVI,MP4,WMV,MPG,MPEG,3GP Our gps provide a lifetime free map update service, You don' t have to worry about updating the map. In general,we update the data once a year. You only need to send us an email, we will provide you a data link to