MP3128 
Setting the Backlight
After selecting "5.Setting" in the MENU mode, choose "2.Backlight".
Set the backlight by pressing the FF/REW button( 
).
Settings Availabe :
Never : No backlight(You can save battery life, if it is set to never)
1 Sec. ON : Backlight ON for 1 Second |
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3 Sec. ON : Backlight ON for 3 Seconds |
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5 Sec. ON : Backlight ON for 5 Seconds |
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Finish the setting by pressing PLAY/STOP( | )or select "5. Go Up" to |
switch to the upper menu. | 21 |