This cable features a Bluetooth module and is specifically designed for car audio or stereo systems as a replacement for the KCE-237B Full Speed AUX Input. It is compatible with Alpine, JVC, and Sony radios, provided the radio has a matching socket and AUX function. Installation is simple: plug the connector into the back of the radio and connect the red wire to 12V+ and the black wire to 12V-. Select Aux on the radio panel, then pair your phone or MP3 player via Bluetooth to stream music. The adapter supports Bluetooth 5.0 and is backward compatible with Bluetooth 2.0, 3.0, and 4.0. It supports decoding of various high-quality audio formats including MP3, WMA, WAV, FLAC, and enables DSD high-capacity audio transmission. In addition to music, audio from apps such as QQ Music, KuGou Music, videos, and navigation maps can be transmitted through the car's audio system. Note that only audio is transmittedvideo content will not display on the car screen. This Bluetooth adapter allows you to play music from your phone or MP3 device through your car radio and includes a built-in microphone for hands-free calling. Specifications: - Bluetooth module connector: 12V - Cable length: approximately 20 cm - Color: black - Material: ABS Package Contents: 1 x Audio Cable Adapter 1 x Bluetooth Microphone Note: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.