Calibration check system uses dual sensors to automatically double-check each reading ; Cuff wrap guide indicator confirms the cuff has been wrapped correctly ; TruRead(TM) automatically takes 3 consecutive readings 1 minute apart and displays the average, following the internationally recognized guidelines for home blood pressure measurement; Patented easy-wrap ComFit(TM) cuff expands to fit both regular- and large-sized arms to ensure more comfortable, accurate readings, eliminating user miscuffing; 2-user mode ; BP level bar shows how users blood pressure compares to internationally recognized norms ; 100-memory storage capacity for each user (200 total) with date and time stamp; Automatically displays the average of up to the last 3 readings taken within the last 10 minute; Irregular heartbeat detector; Bluetooth(R) Smart; Removes user errors such as breathing and noise from movement during measurement that can give inaccurate readings; Backlight and extra-large buttons; Includes main unit, ComFit(TM) cuff (9 in.-17 in.), AC adapter, instruction manual and quick-start guide;