Hi-Tech HE-MP44F User Manual page 26

Redhat 8.0, and above.
The player also supports USB charge, and it
can be used while it's getting charged (in
waiting mode, short press Mode to exit to the
Main menu and use the player.
The player displays the following three modes
during it's connected to the computer:
1.Waiting mode 2.File downloading
3. File uploading
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