Scope of application: Bluetooth AUX IN Adapter does not need to be replaced frequently, with strong practical and durable. Car Bluetooth Music Cable is manufactured according to the original factory specifications and standards, replacement for Alpine KCA‑121B AI‑NET CDA‑9857 CDA‑9886 CDA‑117. | Product function: This bluetooth adapter will effectively help you to play phone music through car radio. Match your phone or pad to bluetooth module, and then choose Aux from your radio, then you can use your phone to play music through car speakers. | High-Quality Material: Car AUX IN Module using premium ABS materials, which is maximize the durability, reliability, wear resistance, and have long service life. It is more reliable and safer than other similar products. And it will be your Ideal choice. | Easy to Install: The outstanding advantage of our Bluetooth Aux in Receiver is that it is simple assembly and disassembly, convenient and practical, you can directly replace the broken or shabby one, helping you save a lot of time and energy. If you want more comfortable for you, our Car Stereo Cable is the best choice for you. | Strict quality control: Each of our products are manufactured in strict accordance with standard specifications. We have quality control system to ensure that the products are of high quality. We will only ship products if they are in good condition. You can buy with confidence. If you have any product questions, please feel free to ask QA below, we will try our best to help you.