Specification: Bluetooth name: JieRui-BT 5908 Bluetooth version: 5.0 (compatible with the following versions) Product voltage: 5-12V Plug: 10-pin interface big plug Compatibility: For BMW (E46): 320i, 320ci, 320cic, 323i, 323ci, 323cic, 325i, 325ci, 325cic, 328i, 328ci, 328cic, 330i, 330ci, 330cic & M3 (Coupe, Sedan & Convertible) 092002-2006. Note: Will work ONLY for BMW E46 3 Series Business CD head units since 092002 or newer. The E46 Business CD head unit manufactured time must be 092002 or newer. Installation method: The frist step, Remove the CD host player, the large plug into the plug in the back of the corresponding audio interface. This is a Bluetooth cable with a large plug, which can be directly inserted into the corresponding large plug interface of the original car's CD host. The second step, Open the phone Bluetooth, search bluetooth click on the link. Third step, The car CD to switch to AUX mode, you can phone all the sound from the car sound. >Note: There are many models of BMW CD hosts, and they are also more complicated. It is recommended to consult us before purchasing. If you are not sure of your car model or technical issues, you can feel free to contact us. Package included: 1 x Music Streaming Bluetooth Adapter Audio Aux Cable Big Plug for BMW E46 10 pin Socket BMW 320 325 323 328 330 M3 3-Series 2002-2006 Busines CD