The FreeStyle Libre 2 reader has optional sounds for Confirmation, High, Low, & Signal Loss Alarms*, Reminders, and Touch Sounds and optional vibrations for Confirmation, High, Low, & Signal Loss Alarms, and Reminders. Sound & Vibration settings can be customized in the Settings menu.
* Notifications will only be received when alarms are turned on and the sensor is within 20 feet unobstructed of the reading device