Feature: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 CableMaterial: ABSFitment:Replacement for 5 Serie (E39 for SA 661-650) Replacement for 5 Serie (E60, E61)Replacement for 6 Serie (E63, E64)Replacement for Z4 Serie (E85 for SA 662)Replacement for X3 Serie (E83 for SA 662)Replacement for X5 Serie (E53 for SA 661-650) Fit for Radio Model:For SA 650 (Radio Business with CD drive)For SA 661 (Radio Business with CD drive)For SA 662 (Radio Business).Package List:1 xBluetooth Module Aux Cable