FreeStyle Libre 2 Sensor The FreeStyle Libre 2 system is a continuous glucose monitoring system which consists of a reader and a disposable sensor worn on the back of the arm. This small sensor, which is the thickness of two stacked quarters, is easy to apply and stays on the body for up to 14 days. Make sure to check your blood glucose levels by scanning the sensor, and it even works through clothing. The FreeStyle Libre 2 system is for adults and children 4 and older with diabetes. FreeStyle Libre 2 Sensor Features: Small size and comfortable to wear - About the size of two stacked US quarters, the sensor may be scanned through clothing. Painless application - A very thin filament sits just under the skin to measure interstitial fluid. Accurate sensor readings - No fingerstick calibrations required, and the system has no interference with medications containing acetaminophen. Water resistant -Stays on the body for up to 14 days, and can be worn while swimming, showering, or exercising. Continuous monitoring - Continuously measures the glucose concentration in your interstitial fluid, and stores 8 hours of data. FreeStyle Libre 2 Sensor Kit Includes: Sensor Sensor applicator (2) Alcohol wipes Product information card Reader not included