Car CD Stereo Wireless Audio Music MP3 Bluetooth Module Aux Interface Adapter For Mercedes Benz Smart 450 451 Grundig Radio Host 8Pin 6Pin Mini ISO Port With Mic This bluetooth adapter helps to play phone music through car radio, it is support call answer. Descriptions: 1. This cable is with Bluetooth module. 2. This product is specially made for car audio/stereo. 3. Can be used with radios if only there is socket for our connector and it has AUX function. 4. Just plug the connector into the back of the radio,connect the two wires with 12V+(red), 12V-(black). 5. Choose Aux from the panel and connect your phone or mp3 with bluetooth. 6. You can enjoy the music from the phone or mp3 pad and more.(They phone should have Bluetooth function.) 7. Bluetooth 5.0 version, and compatible with 2.0 3.0 4.0 other versions of Bluetooth, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format decoding, non-ordinary Bluetooth functions, can support DSD large capacity transmission. 8. In addition, the voice of QQ music, KuGou music, film, map navigation can be transmitted to the car, which can only transmit the sound, not play the image on the car. Specifications: 1 x Bluetooth module connector 12V 1 x red cable 12V + (positive pole) 1 x black cable 12V - (negative) Cable length: approx 15CM Applicable CD Models : For Mercedes Benz Smart Roadster, ForTwo, For Four with OEM Smart 450 (all models) Grundig radio devices Applicable Vehicles Models : For Smart Roadster 2003-2005 For Smart ForTwo 2004-2010 fOR Smart ForFour 2004-2010 YELLOW plug harness: fit for Smart Fortwo 451 (2007 - 2014) Note : All Bluetooth CD players must have aux function, otherwise they cannot be used.