Nextar M3-01 Hardware Instruction Manual page 14

General Setup
Brightness
Tap in the Setup menu to enter Brightness setting menu for backlight adjustment,
as shown below:
Tap , to darken or increase the brightness of the display.
After setting, tap
Volume
Tap in the Setup menu to enter Volume settings menu for volume adjustment, as
shown below:
Tap the to decrease the volume.
Tap the to increase the volume.
Then tap
to confirm or tap
to confirm or tap to cancel.
13
to cancel.