Abbott FreeStyle Libre 2 User Manual page 106

What you see What it means
Notifies you if your glucose rises above
the level you set. The alarm does not
include your glucose reading, so you
need to scan your Sensor to check
your glucose. Swipe or tap to dismiss
the alarm and check your glucose. You
will only receive one alarm per high
glucose episode.
Notifies you if your Sensor has not
communicated with the App for 20
minutes and you are not receiving
Urgent Low, Low, or High Glucose
Alarms. Signal loss could be caused
by the Sensor being too far away
from your smartphone (over 20 feet)
or another issue such as an error or
problem with your Sensor. Swipe or tap
to dismiss the alarm.
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