IRiver Mplayer User Manual page 21

Chapter3
Music
Listening to Music
1. To control the volume while playing, turn the
[ / ] button to left or right.
20
[Volume +]
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Using the Mplayer
[Volume -]
2. To play previous / next music while playing,
turn the [ / ] button to left or right.
[Previous track]
3. To use fast reverse / fast forward function,
turn and hold the [ / ] button to left or right.
[Next track]