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4.3.3.2 History:
Click the history to enter the history recode display window, click return
to return to the previous window, click home page to return to the main
page.
4.3.3.1 Buzzer:
Click the buzzer mute then the buzzer will mute and the red block will
change to green, if the buzzer is on, then click the block buzzer will on
and the block will change to red. click return to return to the previous
window, click home page to return to the main page.