ECOTEST DKG-21 M Operating Manual page 82

Press any control button to switch off audio signal of
the alarm clock. Otherwise, audio signal will be
disabled automatically in a minute after the alarm clock
rings.
4.3.3.10 Battery status control
The mode of battery status control is turned on
automatically at switching on the dosimeter. It is
indicated by the four-segment battery symbol displayed
in the right upper field of the LCD. The number of
segments blinking starting from the last right one shows
the level of battery discharge.
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