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 UPTO 15 days which means product can last from 0 day to 15 days and is water-resistant so continues to work while you shower, swim or exercise. IMPORTANT: The FreeStyle Libre 2 Plus Flash Glucose Monitoring System is indicated for measuring interstitial fluid glucose levels in people (age 4 and older) with diabetes mellitus, including pregnant women. The FreeStyle LibreLink app and the FreeStyle Libre 2 sensor are designed to replace blood glucose testing in the self-management of diabetes, including dosing of insulin. The indication for children (age 4 – 12) is limited to those who are supervised by a caregiver who is at least 18 years of age. The caregiver is responsible for managing or assisting the child to manage the App and Sensor and also for interpreting or assisting the child to interpret Sensor glucose readings. The #1 sensor-based glucose monitoring system used worldwide Easy to use2 The slim sensor is easy and painless3 to attach to the back of your upper arm and can be worn up to 15 days. No finger pricks Dose insulin, confirm hypo or impending hypo, and be alerted when glucose is rapidly changing — all without the need for finger pricks. Discreet & convenient Check your glucose anytime, anywhere₸ with a simple 1-second scan, even through clothing. Optional alarms Get real-time glucose alarms to alert you when your glucose levels are too low or too high. Pack contains 2 sensors and 2 applicators. FREE Ultrahuman Skins: Skin-Friendly, Water Resistant, Latex-Free, 95% Cotton Patches and Alcohol wipes + 3 Month Complimentary Access To Ultrahuman Advanced Glucose Tracking App. NO READER!! NON RETURNABLE!!