Calibration check system uses dual sensors to automatically double check each reading;Cuff wrap guide indicator confirms the cuff has been wrapped correctly;TruRead automatically takes 3 consecutive readings 1 min apart & displays the average, following the internationally recognized guidelines for home blood pressure measurement;Patented easy-wrap ComFitTM cuff expands to fit both regular & large sized arms to ensure more comfortable, accurate readings, eliminating user miscuffing;2-user mode