Features： 1、Simple to install, just plug and play, no complex tools required. 2、Supports bluetooth 5.0, low power consumption, reliable to use. 3、Used for wireless transmission of music, navigation, for Youtube and phone, etc. 4、Button control on radio/steering wheel for easy operation. 5、Select play on the radio and it will start playing automatically. If you change it, it will stop playing. Specification： Condition:  Brand New Item Type: Audio Adapter Material: ABS Color: As picture shown Fitment: Fits for A2 1999-2005 Fits for A3 2001-2006 Fits for A4/S4 1998-2006 Fits for A6/S6 2001-2004 Fits for A8/S8 1999-2003 Fits for AllRoad  2000-2005 Fits for TT 1999-2005 Fits for : Chorus 1, Chorus 2, Concert 1,Concert 2, Symphony 1, Symphony 2, Navigation Plus 1 (non MMI),Navigation Plus 2 (non MMI),Delta(excluding Delta CC),etc (1) Before purchasing, please note that the CD player interface and the product plug are suitable for normal use!  (2) Connect the blue head to the rear interface of the CD player, and connect the small coil to the power cord of the CD player! Package List： 1 x Audio Adapter  1 x 20pin Data Cable 2 x Wrench