Medtronic Guardian 3 Sensor The Guardian Sensor 3 from Medtronic features enhanced performance through the most comfortable and smallest in size glucose sensor. The Guardian Sensor is inserted right under the skin, which allows for measuring glucose values accurately and relays these results to your diabetic pump. It's the first of its kind in continuous glucose monitoring sensors that is FDA approved and trusted to control the dosing. You can also wear the Guardian Sensor up to 7 days! MiniMed Guardian Sensor 3 Features:  Medtronic's most accurate sensor with a MARD* rating of 8.7% using the CONTOUR®NEXT LINK 2.4 Meter Easy to insert Flexible design moves with your body for ultimate comfort Know at all times where your glucose levels are trending Contains 5 MiniMed Guardian 3 Sensor For use with the MiniMed™ 670G and MiniMed™ 630G systems.