Features: 1. Bluetooth 5.0 version, backward compatible with Bluetooth protocols 2.0, 3.0, and 4.0. 2. Enables connection to Bluetooth-enabled devices for external audio streaming. 3. Fully compatible with car radio functions; reliable and easy to use. Compatible with iOS devices including iPhone 5, 5C, 5S, 6, 6 Plus, 7, 8, X, and various Android devices such as Samsung, HTC, Sony, and Nokia (device must have Bluetooth capability). 4. Supports common audio formats including MP3, WMA, WAV, and FLAC for high-quality sound decoding. 5. Supports DSD high-resolution audio transmission for stable data transfer and high-fidelity sound performance. Specification: Item Type: Bluetooth AUX-IN Cable Material: ABS Voltage: DC12V Bluetooth: Bluetooth 5.0 Fitment: Compatible with Citroen models: C2 (2005+), C3 (2005+), C4 (2005+), C5 (2004+), C6 (2005+), C8 (2004+), Berlingo (2005+), Jumpy (2007+), Synergie (2005+) with Blaupunkt/VDO/RD4 systems. Compatible with Peugeot models: Expert (2007+), 207 (2006+), 307 (2005+), 307SW (2005+), 307CC (2004+), 308 (2007+), 407 (2005+), 407SW (2005+), 607 (2005+), 807 (2005+), 1007 (2005+), 4007 (2007+) with Blaupunkt/VDO/RD4 systems. Application: Works with iOS tablets and phones (iPhone 5, 5C, 5S, 6, 6 Plus, 7, 8, X), Samsung, HTC, Sony, Nokia, and other smartphones or tablets equipped with Bluetooth functionality. Installation: 1. Locate the 12-pin socket on the back of the car radio. 2. Plug in the adapter and connect the power cord. Package List: 1 x Bluetooth AUX-IN Adapter 1 x Microphone 2 x Bracket