Honda RDX Owner's Manual page 211

Playing a USB Flash Memory Device (Models without navigation system)
To Play a USB Flash Memory
Device
This audio system can operate the
audio files on a USB flash memory
device with the same controls used
for the in-dash disc changer. To play
a USB flash memory device, connect
it to the USB adapter cable in the
console compartment, then press the
CD/AUX button. The ignition switch
must be in the ACCESSORY (I) or
ON (II) position.
The audio system reads and plays
the audio files on the USB flash
memory device in MP3, WMA or
ᤳ
AAC formats. Depending on the
format, the display shows MP3,
WMA or AAC when a USB flash
memory device is playing.
ᤳ: Only AAC format files recorded
with iTunes are playable on this
audio unit.
The recommended USB flash
memory devices are 256 MB or
higher, and formatted with the FAT
file system. Some digital audio
players may be compatible as well.
Some USB flash memory devices
(such as devices with security lock-
out features, etc.) will not work in
this audio unit.
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