Features: 1.Simply plug the MMI connector into the socket on the back of the radio. 2.Pair your phone or mp3 or Pad with the module compatible with Bluetooth. 3.The module does not require a password when connecting. 4.Plug and play ,very quick and convenient in use. 5.Match your phone or tablet to the Bluetooth module, then select Aux from the radio, and then you can use your phone to play music through the car speakers. 6.Set up automatic pairing in one minute, existing CD changer can still be used. Specification: Item Type:Audio Receiver Material:ABS Color:Black Compatible with Bluetooth 4.1 Wire Length:23cm / 9.06in Supported Configuration File:A2DP (Audio transmission) Fitment: Fit for Benz (fit for 2009 and later Model!!!!) Fit for C class Fit for CLS 2010 Fit for E class (W212 / S212) Fit for M class Fit for R class Fit for S class and others with the special equipment Media Interface (Code 518) PackageList: 1 x Audio Adapter