TOYOTA 2011 Yaris Sedan - Manual (Page 213)

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3-2. Using the audio system
3
Inte
rior fe
atures
n Operating portable audio devices connected to the audio system
The volume can be adjusted using the vehicle’s audio controls. All other
adjustments must be made on the portable audio device itself.
n When using a portable audio device connected to the power outlet or
cigarette lighter
Noise may occur during playback. Use the power source of the portable
audio device.