1,Fitment: Bluetooth AUX in cable is specially designed, comes with handsfree mic, replacement for Citroen C2 C3 C4 C5 C6 C8 Replacement for Peugeot 207 307 407 607 807, etc. 2,No Functional Limitation: The car bluetooth wireless module supports bluetooth enabled devices without the functional limitations of car radios, allowing you to connect external audio sources. 3,Bluetooth Version: Using Bluetooth 5.0 protocol, it is backward compatible with other versions of Bluetooth protocol 2.0 3.0 4.0 5.0. With the advancement of wireless technology, the accompanying wireless transmission is the general trend. 4,Audio Format: The car Bluetooth wireless module can support common MP3 format audio, and also support for WMA, for WAV, for FLAC and other high quality audio format decoding. 5,Advantage: The bluetooth aux in adapter supports DSD large capacity transmission, and the data transmission between devices is stable and fidelity, specially designed for music lovers. In addition, you can also use it to watch movies, map navigation, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.