For Peugeot Citroen RD4 player radio Vehicle RD4 Player for Peugeot206 207 307 for Citroen C2 C3 C4 Picasso|Car Radios| - AliExpress
USB SD AUX MP3 Adaptor for RD4, RT3 (Software from 6.x), RT4 Radio for the
RD45 Car Radio USB, AUX, Bluetooth for Peugeot 207, 206, 307, for Citroen C3, C4, C5, CD Player Upgrade of RD4 CD Car Audio for 226.60 € - Radio & Parts
Install Bluetooth Audio Module on Peugeot & Citroen Radio RD4, RD45, RD43 - YouTube