Libre 2

• Functionality: Gathers biodata in real-time and holds 8 hours of data. Tap to transfer biodata from the sensor to the app
  
  
• Size: Roughly the size of a quarter
  
  
• Duration: 14 days

Libre 3

• Functionality: Gathers biodata in real-time and holds 8 hours of data. Automatically transfers biodata via bluetooth to App.
  
  
• Size: Roughly the size of two pennies stacked
  
  
• Duration: 14 days