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How many alarms does FreeStyle Libre 2 system have?

The FreeStyle Libre 2 system has 3 alarms: 

Low Glucose Alarm - an alarm will notify you when your glucose falls below a level you set

High Glucose Alarm - an alarm will notify you when your glucose rises above a level you set

Signal Loss Alarm - an alarm will notify you when the glucose alarms you set are not available because your Sensor has lost communication with the Reader for 20 minutes

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