CITROËN C4 Handbook page 106

Ease of use and comfort
USB Player
This connection box comprises a USB port and
a Jack auxiliary socket.
USB port
The USB port allows the connection of a
portable device, such as a digital audio player
type or a USB memory stick.
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of the iPod
The USB player reads your audio files, which
are transmitted to your audio system and
played via the vehicle's speakers.
The management of these files is from the
steering mounted controls or the audio system.
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When connected to the USB port, the
portable device charges automatically.
While charging, a message is displayed
if the power consumption of the
portable device exceeds the current
delivered by the vehicle.
The USB also allows a telephone to be
connected by a MirrorLink™ connection, so
that use can be made in the touch screen tablet
of certain applications on the telephone.
Jack auxiliary socket
The Jack auxiliary socket allows the connection
of a portable device, such as a digital audio
player, so that your audio files can be heard
through the vehicle's speakers.
The management of these files is from the
portable device.
For more information, refer to the
corresponding part of the "Audio and
telematics" section.