The Signal Loss Alarm* lets users know if a total of 20 minutes has passed and there is still no connection between the sensor and the phone†. The Signal Loss Alarm in the FreeStyle Libre 2 app† is intended to notify users when alarms are not available.
* Alarm notifications will only be received when alarms settings are enabled and turned on and sensor is within 20 feet unobstructed of the reading device.
† The FreeStyle Libre systems apps are only compatible with certain mobile devices and operating systems. Please check the Support section of our website for more information about device compatibility before using the apps. Use of the FreeStyle Libre systems apps may require registration with LibreView.