The bluetooth module is made for E46 It is bluetooth 4.1 version, Support 4.0 /3.0 /2.0 Just plug the 10pin connector into the socket back of your radio- You can just Insert this item to the back radio then Connect the red wire to 12V+, the black wire to 12V-.- 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. Colour: Black material: plastic You can hear music from your phone/pad/mp3(They should have blueooth function). Pls note : Production Date of your Radio Must be 09/2002+. Production date is found on white sticker under radio. Will NOT fit for 3-series Equipped With Navigation. Cable length: 23cm Applicable models: 1999 - 2006 for (E46): 320i, 320ci, 320cic, 323i, 323ci, 323cic, 325i, 325ci, 325cic, 328i, 328ci, 328cic, 330i, 330ci, 330cic & M3 (Coupe, Sedan & Convertible) Package includes : 2 PCS Bluetooth adapter Only 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.