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 Cable Material: ABS Fitment: 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 x Bluetooth Module Aux Cable