2-8-2.System Status
To view the status of volume, backlight, key tone, main memory space, font,
＊Tap 
to return to previous screen.
2-8-3.Volume Adjustment
To adjust the volume and balance.
＊Tap 
to return to previous screen.
2-8-4.LCD Contrast
1.To adjust the backlight.
2.Tap the center of the circle 
for correction by turns of center, right- top,
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