A simple and efficient way to check your blood sugar is with the OneTouch* Ultra* System. It utilizes an innovative method to measure the glucose content in a blood sample. Test strips are infused with chemicals that produce an electric current when mixed with glucose. The amount of electric current produced is then calculated by the glucose meter. The glucose meter in OneTouch Ultra System is plasma-calibrated and therefore will yield test results that are 12% higher than results displayed in glucose meter systems calibrated for whole blood.