Features: 1.No Functional Limitation: Operate through Bluetooth enabled devices, there is no functional limitation of car radio, allowing you to connect to external audio sources. 2.Strong Compatibility: Using Bluetooth 5.0 protocol, backward compatible with other versions of Bluetooth protocols such as 2.0, 3.0 and 4.0. 3.Easy Operation: Match your phone or tablet to bluetooth module and choose Aux from your radio, then you can use your phone to play music through car speakers. 4.Durable Material: Lightweight ABS exterior material, waterproof and wear?resistant, easy to carry, allowing you to enjoy wonderful music while driving. 5.Easy Installation: Just plug the connector into the socket back of your radio, plug and play installation, easy to use. Specification: Item Type: Bluetooth Module Aux Cable_x000D_ Material: ABS_x000D_ _x000D_ Fitment:_x000D_ _x000D_ Replacement for 5 Serie (E39 for SA 661-650) _x000D_ Replacement for 5 Serie (E60, E61)_x000D_ Replacement for 6 Serie (E63, E64)_x000D_ Replacement for Z4 Serie (E85 for SA 662)_x000D_ Replacement for X3 Serie (E83 for SA 662)_x000D_ Replacement for X5 Serie (E53 for SA 661-650) _x000D_ _x000D_ Fit for Radio Model:_x000D_ For SA 650 (Radio Business with CD drive)_x000D_ For SA 661 (Radio Business with CD drive)_x000D_ For SA 662 (Radio Business)