Features:Control test: used for periodic blood glucose meter and test strip accuracy checksEnsure accuracy: CONTOUR NEXT control solution verifies the accuracy of your blood glucose meter and test stripsEasy to use: simply add a drop of control solution to the test strip and run a standard glucose testWhen to perform control solution testing: you should perform a control test when: using your meter for the first time; you open a new bottle or package of test strips; you think your meter may not be working properly; you have repeated, unexpected blood sugar resultsAccuracy check: use with the CONTOUR NEXT test strips as an accuracy check to ensure its blood glucose monitoring system is working properly