Features :- Function via Bluetooth-enabled devices- No functional limitations of the car radio- Allows you to connect an external audio source- It is possible from your smartphone to your car stereo to stream- Pair your phone with our bluetooth module,and choose Aux from your radio.- You can enjoy music from your phone through car speakers.- You can just Insert this item to the back radio then Connect the red wire to 12V+, the black wire to 12V-.- Match your phone or pad mp3 to bluetooth module.and Choose Aux from your radio, then you can use your phone to play music through car speakers.- Bluetooth 5.0 version, and compatible with 2.0 3.0 4.0 other versions of Bluetooth, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format decoding, non-ordinary Bluetooth functions, can support DSD large capacity transmission.Installation:Red power cable connected to 12V+Black power cable connected to 12V-plug into the CD player JackCompatible2003 - 2008 For BMW (E85/E86): Z4 (2.0, 2.5, 3.0 & Coupe and Convertible models)2004 - 2010 For BMW (E83): X3 (2.0, 2.5, 3.0 & xDrive models)2000 - 2006 For MINI COOPER: COOPER (R50), COOPER S (R53) & JC WORKS (Coupe & Convertible)Radio Boost CD 53 / Business CDPackage included:1* Bluetooth Adapter