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