GPS BOX Built-in Interface Specifications GPS BOX Built-in Interface For Audi A6L A8 Q7 FEATURES: 1. Achieving navigation, Amusement more function in one unit. 2. Intergrate audio-video system, Intelligent gps navigation by touch; 3. Bluetooth handfree communication; 4. Hi-Tech digital playing system; 5. Support reversing rear view trajectory guide function; 6. Support original car interface style, original button or touchscreen operate ; 7. Compact size, Easy to install with original imported connector, no need cut any cables; 8. Signal selection, AV input/ Output, it' s convenient to connect with external singal; 9. Compatible external or Original reversing system.