What is freestyle libre 2 sensor glucose monitoring system? A small, discreet sensor that is worn on the back of the upper arm and continuously measures the glucose concentration in the body's interstitial fluid day and night. The sensor updates the glucose result every minute and stores up to eight hours of glucose readings in 15 minute intervals. It can be worn for up to 14 days, which means the product can last from 0 days to 14 days and is water resistant, so it continues to work while you shower, swim or exercise. What are the key features? The 1 sensor based glucose monitoring system used worldwide. Real time glucose monitoring. Optional glucose alarms provide a safety check every single minute. The freestyle libre 2 has excellent 14 day accuracy. The freestyle libre 2 system is proven to have significant clinical and real world benefits for patients with t1d and t2d mdis. The freestyle libre 2 system is made up of the freestyle libre 2 sensor and the freestyle libre link app. Ingredients what's included? 1 sensor applicator, 1 sensor pack and product insert. Ingredients