Lexus IS F 2012 Owner's Manual page 276

3-2. Using the audio system
Operating portable audio devices connected to the audio system
■
The volume can be adjusted using the vehicle's audio controls. All other adjust-
ments must be made on the portable audio device itself.
When using a portable audio device connected to the power outlet
■
Noise may occur during playback. Use the power source of the portable audio
device.
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