GROM AUDU3 for Select Audi USB Android iPod iPhone; Bluetooth AUX HD Radio Capable Adapter GROM-USB3 adapter connects USB 2.0 flash drive and mass storage device, iOS and Android devices, via USB port, to the stock stereo in your car. Android integration requires DashLinQ Android App, available at Google Play Store You can control the playback through your car stereo or steering wheel controls. OPTIONAL: GROM Bluetooth Dongle (SKU: BTD); AUX-In 3.5mm and 5V USB charging cable (SKU: 35USB); HD Radio tuner (SKU:HDR1) ATTENTION: Please see compatible cars in Product Description. For help with installation please watch "GROM Audio" video channel at YouTube.com.