1. Connect your device (e.g., smartphone or iPod) to the AUX input on your Kenwood car radio using the appropriate audio cable.
Enable your device's audio output.
2. On your iPhone, go to "Settings" > "Bluetooth," select your car radio from the list of available devices, and then tap the "Audio" button.
Select the auxiliary input on your car radio.
3. On your car radio, press the "Source" or "Aux" button until the "AUX" input is selected.
Adjust the volume.
4. Adjust the volume on your device and the volume on your car radio as desired.
Play audio.
5. Play audio files on your device, and you should be able to hear them through your car stereo speakers.