Oem Fit Car Dvd Player Gps Navigation for 2002-2008 Audi A4 with Canbus/ High Definition Touchscreen / Back up Sensor/ 8gb Sd Card/4gb Usb Built-in Memory: 128 MB Nand Flash(standard), up to 4GB (optional), Transfer songs, photos ,videos among SD card, Built-in Nand Flash& USB Flash USB Port: 2 Port available, support USB Mobile Hard Drive (exFATno capacity limit), High-Speed USB 2.0: 480Mbps High Speed USB 2.0 Interface Storage Card: 4GB SD card(standard), up to 32GB(Optional)