No Need Password: Adopt Bluetooth 4.1 version, no need password when connecting.
Simple to Use: Just plug the blue connector into your radio's rear socket, simple to use.
Pair your phone: Pair your phone or pad to the Bluetooth module and choose Aux from your radio, then you can use your phone to play music through the car speakers.
Listen to Music: Allows you to listen to music from your phone/pad/mp3 (they must have blueooth function).
Stable Use: The Bluetooth module is designed for Alpine KCE 237B, stable and reliable for using.