The Guardian Link 3 Transmitter Kit is easy to insert and features a flexible design that moves with your body for ultimate comfort. The kit designed to work with the 670G insulin pump and is a well-tested and advanced continuous glucose monitoring solution that allows you to track and manage diabetes with ease; know at all times where your glucose levels are trending. It is the first and only system that constantly adjusts to automatically keep your sugar levels in a healthy range. It is also the first and only continuous glucose monitoring sensor that is FDA approved and trusted to control insulin dosing as well as the most accurate Medronic sensor with a MARD (Mean Absolute Relative Difference) rating of 9.65% using CONTOUR NEXT LINK 2.4 Meter (3-4 calibrations per day required); plus, you can wear it for up to 7 days!