CITROEN C4 CACTUS Handbook page 74

Ease of use and comfort
USB port
It allows the connection of a portable device or
a USB memory stick.
It reads the audio files which are sent to your
audio system and played via the vehicle's
speakers.
You can manage these files using the steering
mounted or audio system controls.
For more information on using this
equipment, refer to the "Audio and
telematics" section.
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When the USB port is used, the
portable device charges automatically.
A message is displayed if the power
drawn by the portable device exceeds
the current supplied by the vehicle.
Auxiliary socket
It permits the connection of a portable device
to listen to your music files via the vehicle's
speakers.
The management of the files is done using your
portable device.
For more information on the use of
this equipment, refer to the "Audio and
telematics" section.