User manual

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Chapter 3: General Instructions
 : there are 21 languages for your selection, including English,
French, German, Italian, Spanish, Dutch, Portuguese, Russian, Czech,
Croatian, Polish, Romanian, Hungarian, Turkish, Simplied Chinese,
Traditional Chinese, Japanese, Korean, Thai, Indonesia, Persian.
 : enables the key lock function. A long press for 5 seconds on
the MENU Button disables the key lock function.
 : shows the monitor information.
 : “Yes” allows you to restore the default settings.