1. This cable is with Bluetooth module;2. This product is specially made for car audio/stereo, it's a repment of KCE-237B Full Speed AUX Input.3. Can be used with Alpine/JVC/ radios if only there is socket for our connector and it has AUX function;4. Just plug the connector into the baof the radio,connect the two wires with 12V+(red), 12V-(black).5. Choose Aux from the panel and connect your phone or mp3 with bluetooth;6. You can enjoy the music from the phone or mp3 pad and more.(They phone should have Bluetooth function.)7. Bluetooth 5.0 version, and compatible with 2.0 3.0 4.0 other versions of Bluetooth, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format de, non-ordinary Bluetooth functions, can support DSD large capacity nsmiion.8. In addition, the voice of QQ music, KuGou music, film, map can be nsmitted to the car, which can only nsmit the sound, not play the image on the car.Car Radio KCE-237B Full Speed AUX Input Repment 3.5MM Audio MP3 Bluetooth 5.0 Microphone Adapter for AlpineThis bluetooth adapter helps to play phone music through car radio and supports call answer by microphone.Specifications:Bluetooth module connector: 12VCable length: approx 20 cmcolour: blackMaterial: ABSPackage Contents:1 x Audio Cable Adapter1 x bluetooth MicrophoneOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.