Text to Speech is an optional feature of the FreeStyle LibreLink app. When the feature is turned on in the app your glucose reading and your trend arrow will be read aloud when you scan your Sensor. This feature is by default turned off in the app. To turn it on go to the FreeStyle LibreLink app settings menu, select the Text to Speech and turn it on. Note that the text to speech reads aloud only your glucose reading and your trend arrow. Always review the My Glucose screen to get complete information. Remember that the Text to Speech inherits the volume settings on your smartphone. If your smartphone volume is turned off, you will not hear the glucose reading read aloud.