TOYOTA 2011 Matrix - Manual (Page 241)

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3-2. Using the audio system
NOTICE
■ To prevent damage to a USB memory
● Do not leave a USB memory in the vehicle. The temperature inside may
become high, resulting in damage to the player.
● Do not push down on or apply unnecessary pressure to the USB memory
while it is connected as this may damage the USB memory or its terminal.
● Do not insert foreign objects into the port as this may damage the USB
memory or its terminal.