BenQ Joybee 125 - Manual (Page 71)

Using BenQ Joybee 125 MP3 Player
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5. When the dialog box disappears, the Joybee Firmware
Update main menu will on the PC screen.
6. Press Start and the bottom dialog box will appear on the
screen. Press Yes to start firmware update.
Do not disconnect Joybee 125 from the PC while firmware update
is in progress.