... , PCB function, play message display.GPS(Optional)Operation system:Windows CE6.0 Built-in GPS navigation; external GPS is optional Support Garmin, Navteq,TOMTOM ... audio play.USB/SD/AUX port1 SD slot for music/movie, 1 slot for GPS Directly play MP3, MP4, WMA, AV1, JPEG and ... -mark,ISODelivery tiem1-20 days,some have stocks car dvd GPS Navigation for AUDI A3