you can just Insert this item to the back radio then Connect the red wire to 12V+, the black wire to 12V-.
match your phone or pad to bluetooth
module.and Choose Aux from your radio, then you can use your phone to
play music through car speakers and talk to phone.
it can work play music on usb sticker or SD card
Condition:100% Brand new
Material:ABS Plastic
Include:1 x Bluetooth module radio stereo Aux cable adaptor
Bluetooth version: 4.0
Length: 150cm
work on:
VW RCD310/RCD510/RNS510