The Bluetooth module is designed for Z4. Simply plug the 16-pin connector into the socket on the back of the radio. Connect this to the rear radio, then connect the red wire to 12V+ and the black wire to 12V-. Pair your mobile phone with the Bluetooth module, select Aux on the radio, and play music from your mobile phone through the car speakers. You can listen to music from your phone or MP3 player, provided they have Bluetooth capabilities.Fitment: For (E60): 5 Series: 525i, 525it, 528i, 528it, 530i, 530it, 540i, 540iT & M5 (Sedan and Touring) 2004–2010 For (E63) (E64): 6 Series: 630Ci, 630i, 645ci, 650i, M6 (Coupe and Cabriolet/Convertible) 2003–2010 For (E65) (E66): 735i, 735li, 740i, 740li, 745i, 745li, 750i, 750li, 760i, 760li 2002–2008 Compatible with M-ASK, ASK-CD Compatible with 1 Series (E87, E88, E81, E82), 3 Series (E90, E91, E92) Suitable for 2004–2010 modelsSpecifications: Voltage input: 5V–12V DC Working current: 600mA Standby current: 20mA DAC resolution: 20bit Harmonic distortion: 0.05% Signal to noise ratio: 90dB Frequency response: 20Hz–20kHz Operating temperature: -35°C to +75°C Includes built-in microphone Color: Black Material: Plastic and electronic componentsPackage Contents: 1 x Bluetooth adapter 1 x Microphone Note: Light and display settings may cause slight color differences between the product image and the actual item. Measurement may vary by ±1–3 cm.