The MyStar Extra® system is used as follows: For patient self-measurement of blood glucose levels as an aid to monitoring blood glucose control. For measuring blood glucose levels from capillary whole blood samples taken from the fingertip. For in-vitro diagnostic use only (i.e., outside the body). For use only with BGStar® test strips and control solution. Do not use test strips and control solutions from other manufacturers with this meter. This could distort the measurement result. BGStar® test strips are designed for use with Sanofi meters. To estimate the users HbA1c value