Usage Tips:Features: 1.A wonderful replacement for 5 Series E39 with SA 661?650 and other models to accurately and conveniently meet your needs. 2.You can use your device to play music through car speakers through matching your device to bluetooth and choosing Aux from your radio. 3.You can hear music from your device with blueooth function, and answer calls with bluetooth 5.0, enjoy clear sound and stable connection. 4.Compatible with Bluetooth 5.0 protocol, backward compatible with 2.0 3.0 4.0 other versions of Bluetooth protocol. Simple to use, plug and play. 5.Support familiar MP3 format audio, and support for WMA, for WAV, for FLAC, and other high?quality audio format decoding. 6.Applicable to DSD large?capacity transmission, stable data transfer between devices, fidelity, designed for music enthusiasts. Specification: Item Type: Microphone Adapter Material: ABS Voltage: DC12V Bluetooth: Bluetooth 5.0 Microphone Cable Length: Approx. 150cm/59in (manual measurement will have errors) Fitment: Replacement for 5 Series (E39 with SA 661-650) 2002 - 2014 Replacement for 5 Series (E60, E61) 2002 - 2014 Replacement for 6 Series (E63, E64) 2002 - 2014 Replacement for Z4 Series (E85 with SA 662) 2002 - 2014 Replacement for X3 Series (E83 with SA 662) 2002 - 2014 Replacement for X5 Series (E53 with SA 661-650) 2002 - 2014