IRiver MPlayer User Manual page 22

Chapter3 Using the Mplayer
Music
Selecting additional functions (Shuffle On / Off)
1. Turn the [ / ] buttons shortly to left / right together
to activate the function. You will hear a beep.
[Volume +] [Next track]
1. Turn the [ / ] buttons shortly to left / right together
to activate the function. You will hear a beep.
[Volume -] [Previous track]
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