If no Bluetooth capability factory fitted into your Audi, enjoy flexible hands free Bluetooth wireless connectivity with your vehicle's media centre. This Bluetooth Receiver plugs into the Aux Input on the Audi. Now using this adapter that inserts in the Aux Input socket, you can have Bluetooth connectivity for your phone/mp3 player and play audio and voice calls through the vehicles radio/media centre without the need for more expensive hands-free installation kits. Charging USB cable and instructions included. Typical use of 2hrs 30min between charges on the internal rechargeable battery or continuous powered when connected to the adjacent USB port on the Audi.