Features:Function via Bluetooth-enabled devicesNo functional limitations of the car radioAllows you to connect an external audio sourceWith the improvement of wireless technology and the subsequent wireless transmission is the trend of the Adopt Bluetooth 5.0 protocol, backward compatible with 2.0 3.0 4.0 5.0 other versions of Bluetooth protocol, can support common MP3 audio, also support for WMA, for WAV, for FLAC, and other high-quality audio decoding, non-general ordinary Bluetooth function, can support DSD -capacity transmission, stable data transfer between devices, fidelity, designed for music enthusiasts.In addition, you can use watching , map navigation, etc.plug into the CD player ( confirm corresponding socket), mobile phone is connected with the Bluetooth module,aux audio source , you can play mobile phone music.Applicable Car Models:for :09/2002- 2006 (E46): 320i, 320ci, 320cic, 323i, 323ci, 323cic, 325i, 325ci, 325cic, 328i, 328ci, 328cic, 330i, 330ci, 330cic & (Coupe, Sedan & Convertible)Note: Will work E46 3 Series Business CD head units since 09/2002 or newer , The E46 Business CD head unit manufactured time must be 09/2002 or newerColour:BlackMaterial:ABSPackage Contents:1 x Audio Cable Adapter1 x Bluetooth microphoneOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.