.Made of , and practical to use Function via Bluetooth-enabled devices.No functional limitations of the car radio Allows you to connect an external audio source With the improvement of wireless technology and the subsequent wireless transmission is the trend of , Adopt Bluetooth 5.0 protocol, backward compatible with 2.0 3.0 4.0 other versions of Bluetooth protocol, can support common MP3 format audio, also support for WMA, for WAV, for FLAC, and other high-quality audio format decoding, non-general ordinary Bluetooth function, can support DSD Large-capacity transmission, stable data transfer between devices, fidelity, designed for music enthusiasts.in addition, you can use watching , map navigation, etc. Installation: Plug into the CD player Jack (please confirm corresponding socket), mobile phone is connected with the Bluetooth module,aux audio source selection, you can play mobile phone music. Fitment: For C2 2005 + // RD4 For C3 2005 + // RD4 For C4 2005 + // RD4 For C5 2004 + // RD4 For C6 2005 + // RD4 For C8 2004 + // RD4 For Berlingo 2005 + // RD4 For Synergie 2005 + // RD4 For Expert 2007 + // RD4 For 207 2006 + // RD4 For 307 2005 + // RD4 For 307SW 2005 + // RD4 For 307CC 2004 + // RD4 For 2007 + // RD4 For 407 2005 + // RD4 For 407SW 2005 + // RD4 For 607 2005 + // RD4 For 807 2005 +// RD4 For 1007 2005 + // RD4 For 4007 2007 + Blau// RD4 Colour:Black Material:ABS Package Contents: 1 x Bluetooth Adapter 1 x Microphone Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.