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 Cable Material: ABS Fitment: (do not fit for V and RCD200 ) Fit for Delta 6/7 Fit for Premium 6/7, R100/110, RCD300/500, RCD-210/310/500 Fit for RNS-300/310/510 Fit for RNS MFD2 CD/DVD Compatible: Compatible for Seat Radio CD-1/2/3, PN-1/3, RNS-4, SE359/360 Wiring: The red wire connects to the positive pole The black wire is connects to the negative pole The signal receiving connector connects to the radio signal interface (Your CD stereo must have the "AUX" button!!!) PackageList: 1 x Bluetooth AUX-IN Adapter 1 x Microphone