1、Fitment: The AUX adapter cable is perfect replacement for Alpine KCE‑237B wireless radio, and compatible for Alpine Full Speed Head Unit. 2、Great Experience: The cable supports MP3 audio format as well as WMA, WAV and other high quality audio formats, providing you with great experience to enjoy music from your phone. 3、Play Music Through Speaker: 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、Reliable Material: Made of premium ABS material, the AUX adapter cable is wear resistant, durable and not easy to damage, with a long service life. 5、Plug And Play: Easy installation and practical to use, plug and play without complicated procedures, the AUX IN cable is more convenient to use.