See also:

Adjusting sound quality and volume balance
Press the “TUNE/SEL” knob to enter iPod menu mode. Pressing the “TUNE/SEL” knob changes sound modes.  - About iPod • Apple is not responsible for the operation of this device o ...

Cooling system
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Natural speech information (English only)
Due to natural language speech recog- nition technology, this system enables recognition of a command when spoken naturally. However, the system cannot recognize every variation of each com- mand ...