GMC 2007 Yukon XL Owner's Manual page 323

Headphones
The RSE includes two 2–channel wireless
headphones that are dedicated to this system.
These headphones are used to listen to media
such as CDs, DVDs, MP3s, DVDAs, radio, or any
auxiliary source connected to the auxiliary input
jack, if your vehicle has this feature or A/V
jacks. The wireless headphones have an ON/OFF
button channel 1/2 switch, and a volume control.
If your vehicle has a third row video screen
display, it will have two additional headphones.
Push the power button to turn on the headphones.
An indicator light located on the headphones
will illuminate. If the light does not illuminate, the
batteries may need to be replaced. See "Battery
Replacement" later in this section for more
information. Switch the headphones to OFF when
not in use. Channel 1 is dedicated to the video
screen, while Channel 2 is dedicated to RSA
selections.
The infrared transmitters are located at the rear of
the RSE overhead console. The headphones
will shut off automatically to save the battery power
if the DVD system is shut off or if the headphones
are out of range of the transmitters for more
than 3 minutes. If you move too far forward or step
out of the vehicle, the headphones will lose the
audio signal.
The headphones will automatically turn off after
4 hours of continuous use.
To adjust the volume on the headphones, use the
volume control located on the right side.
For optimal audio performance, the headphones
must be worn correctly. The symbol L (Left)
will appear on the upper left side, above the ear
pad and should be positioned on the left ear.
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