1The 3.5 mm plug is plugged into the headphone jack. AUX can transfer music to a car via a mobile phone and play music through the car. 2Car radio has no functional limitations, allowing you to connect external audio sources. 3Pair your phone with our Bluetooth module and select Aux from the radio. 4You can enjoy the music in your phone through the car speakers. 5This item is for any phone or tablet (make sure your phone or tablet has Bluetooth).Features: The 3.5 mm plug is plugged into the headphone jack. AUX can transfer music to a car via a mobile phone and play music through the car. Car radio has no functional limitations, allowing you to connect external audio sources. Pair your phone with our Bluetooth module and select Aux from the radio. You can enjoy the music in your phone through the car speakers. This item is for any phone or tablet (make sure your phone or tablet has Bluetooth). Bluetooth version 4.0, compatible with 2.0, 3.0, 4.0 Bluetooth, can support commonly used MP3 format audio. It also supports high-quality audio format decoding such as WMA WAV FLAC, which supports DSD high-capacity transmission. Installation is very simple. Stable transmission. Specification: Condition: Brand New Color: Black Material: Plastic Wiring: Red-Positive, Black-Negative Fitment: Fit for Citroen C2 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen C3 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen C4 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen C5 2004 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen C6 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen C8 2004 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen Berlingo 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen Jumpy 2007 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Citroen Synergie 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot Expert 2007 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 207 2006 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 307 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 307SW 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 307CC 2004 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 308 2007 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 407 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 407SW 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 607 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 807 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 1007 2005 + fit for Blaupunkt/VDO/fit for Bosch RD4 Fit for Peugeot 4007 2007 + fit for Blaupunkt/VDO/fit for Bosch RD4 Installation: 1. Remove the CD player and insert the audio into the appropriate audio connector on the back of the CD player. The red wire of the product power cord is connected to the positive pole of the power plug, and the black wire is connected to the negative pole of the power plug. (If you don't use these two lines (red) and black, you can't charge Bluetooth.) 2. Turn on the phone Bluetooth, search for: Kevery, click Connect. 3. The car CD switch AUX mode can make all the sounds from the car. Package List: 1 x Radio Adapter Cable