Nextar MA230 Instruction Manual page 9

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To save battery power, the display can be
turned off according to the time set.
Select the menu item Auto Power Off and
press the Mode button to confirm.
Use the Forward/Rewind buttons to select a
value from 0 to 60 seconds, where 0 means
the function is disabled.
Press the Mode button to confirm. Use the
Forward/Rewind buttons to select the menu
item Exit.
language
With this function you can select the font
and the displayed language respectively.
Press the Mode button for more than 3
seconds to get to the main menu.
Use the Forward/Rewind button to select
the menu item SYS.
Press the Mode button to confirm.
Use the Forward/Rewind button to select
the menu item Language.
Press the Mode button to confirm.
Use the Forward/Rewind button to select
the desired language.
Press the Mode button again to exit.