The device volume will be a little lower than the CD volume. After installation,you need to adjust the volume on the CD Player. Please do not pull out the CD power cord when you install it. Compatible with: For 12pin: 2009-2011 2007-2011 2004-2011 Fox 2004-2011 Golf//R32 2003-2011 2004-2011 2005-2011 2007-2011 Rabbit 2003-2011 T5 2007-2011 2002-2011 2003-2011 For : 2008-2010 A3 2007-2010 A4/S4 2007-2010 This adapter mainly depends on the radio model. Compatible with these Head Units: For : 6(in T5&), 7, Premium 6/7, R100/110, RCD100/200/210/300/310/500/510, Navigation 7L6, Z6Z7, New , RNS2, MFD2, RNS300/310/510 without (RCD 310 radio on for model year 2011 & 2012 do not support CD changer function.) For : For Concert 3, 3, Symphony 3, Navigation Plus 3, 6, 7, Navi BNS 5.0 without MMI, Navi -E without MMI For : Audience, Beat, , Dance, Melody CC, Melody CD, MFD2, DVD, , RCD 300 /500, 2, 300, , Symphony MP3, Swing For : CD1/CD2/CD3, RNS2-MFD2, PN1(Monochrome), PN3(Multicolor) Please note : RCD 310 radio on for model year 2011 & 2012 do not support CD changer function. Not compatible with 2011 and newer RCD310/RCD500/RCD510/RNS300/RNS310/RNS510/SWING/ TravelPilot color:Black Material:plastic Package Contents: 1 x Car Audio AUX Adapter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.