Features:1.12pin bluetooth AUX?IN adapter, perfectly fit for RCD210 RCD300 RCD310 RNS310 MFD2.2.Compact size, light weight, this adapter is portable, easy to carry and store.3.High?quality ABS material, high toughness, sturdy, wear?resistant and durable.4.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.5.Built to meet standard specification, strictly follow factory quality control.Specification:Item Type: Bluetooth AUX-IN CableMaterial: ABSFitment:(do not fit for V and RCD200 )Fit for Delta 6/7Fit for Premium 6/7, R100/110, RCD300/500, RCD-210/310/500Fit for RNS-300/310/510Fit for RNS MFD2 CD/DVDCompatible: Compatible for Seat Radio CD-1/2/3, PN-1/3, RNS-4, SE359/360Wiring:The red wire connects to the positive poleThe black wire is connects to the negative poleThe signal receiving connector connects to the radio signal interface(Your CD stereo must have the "AUX" button!!!)PackageList:1 x Bluetooth AUX-IN Adapter1 x Microphone