This item is used for evaluating glucose levels in interstitial fluid. The Libre 3 sensor estimates blood sugar using a preprogrammed algorithm. Libre sensors are intended to be worn on the body for 14 days and provides continuous glucose data that can be accessed by using the Libre App on a smartphone or with a Libre Reader. Scanning the sensor provides glucose levels in real time. The Libre 3 has alarms that can be set to alert when glucose readings go out of a set range. Libre 3 provides continuous monitoring. This item is sold for research purposes only.