1Fitment: This bluetooth Aux adapter comes with all the new design, perfect replacement for Cda?9852 E Cda?9856 E Cda?9857 E Cde?9870 Rm Cde?9871 Rr Cde?9873 Rb Cde?9881 Rb Cda?9883. 2Music Enjoyment: This bluetooth adapter can open and use hidden functions, and supports online music playing. In the streaming media era, it is very convenient to play various songs online, and the sound source is updated in a timely manner. 3Wide Application: This bluetooth aux adapter is equipped with different connector pairs according to the interfaces reserved behind the main engine for different brands of vehicles. 4Plug and Play Style: Install the bluetooth audio cable via original Cd changer port, which is easy and fast, perfectly integrated with the car. 5Noise Reduction: With a enhanced signal receiving circuit, this Bluetooth aux adapter can be connected pretty fast in long distance, and provide stable and continuous audio sound, and the noise cancellation circuits can make the sound quality much purer and true.