A glucose sensor is the part of a continuous glucose monitoring (CGM) system that is inserted under the skin, which allows it to measure your glucose levels. It sends your glucose data wirelessly to your CGM system receiver or a compatible smart device, helping you can track your blood sugar highs and lows at regular intervals and make more informed treatment decisions. Dexcom G6 is FDA-permitted CGM system that lets you make treatment decisions without fingersticks or calibrations.*

*If your glucose alerts and readings from Dexcom G6 do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.

Source: https://www.dexcom.com/fingersticks