The Bluetooth module is designed for Z4.Simply plug the 16-pin connector into the socket on the back of the radio.You can plug this into the rear radio, then connect the red wire to 12V+ and the black wire to 12V-.Match your mobile phone or to the Bluetooth module, then select Aux from the radio, and then you can use the mobile phone to play music through the car speakers.You can listen to music from your phone//mp3 (they should have Bluetooth capabilities).Fitment:For (E60): 5 Series: 525i, 525it, 528i, 528it, 530i, 530it, 540i, 540iT & M5 (Sedan and Touring) 2004-2010For (E63) (E64): 6 Series: 630Ci, 630i, 645ci, 650i, M6 (Coupe and Cabriolet/Convertible) 2003-2010For (E65) (E66): 735i, 735li, 740i, 740li, 745i, 745li, 750i, 750li, 760i, 760li (and crude oil engine) 2002-2008Suitable for M-ASK, ASK-CDSuitable for 1er Serie (E87, E88, E81, E82), Serie 3 (E90-E91-E92)Suitable for 2004-2010Specifications:Voltage input: 5V-12V DCWorking current: 600mAStandby current: 20mADAC resolution: 20bit harmonic distortion: 0.05%Signal to noise : 90dBFrequency response: 20HZ-20KHZWorking temperature: -35 to +75Note: with microphonecolour: blackMaterial: plastic + electronic componentsPackage Contents:1 x Bluetooth adapter1 x microphoneOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.