1Fitment: Replacement for Citroen C2 C3 C4 C6 Berlingo, Synergie. Replacement for Peugeot 307, 307SW, 407, 407SW, 607, 807, 1007, fit for Blaupunkt, VDO, for Bosch RD4, etc. 2Function: You can use a bluetooth enabled phone or tablet to pair with the bluetooth module, and you can stream from your smartphone to your car stereo. 3Bluetooth Version: The car auxiliary audio adapter supports Bluetooth 0 system, and is compatible with other versions 0 0 0 Bluetooth system. 4Audio Format: Supports common MP3 format audio, also supports for WMA, for WAV, for FLAC and other audio format decoding, and can support DSD large capacity transmission. 5Good Sound Effect: Connect the car stereo through the wiring harness, no interference, no loss of sound quality, comparable to the original CD sound quality.