The Kenwood KDC-MP205 is a car stereo head unit with an auxiliary input port. The aux port allows you to connect an audio source such as a personal audio player or cellular phone, and listen to the audio through your car's speakers. You connect the auxiliary input port to the headphone jack on the audio source device using a 3.5mm auxiliary cable.
Plug the 3.5mm auxiliary cable into the audio source.
Plug the other end into the auxiliary input port on the front of the KDC-MP205.
Press the "SRC" button repeatedly until it displays "AUX."
Press "Play" on the audio source to start playing the music.
