The OMRON 3 Series Upper Arm home blood pressure monitor minimizes the impact your breathing and movements have on your blood pressure reading results, helping to reduce measurement inconsistencies and errors. It will capture your blood pressure readings, any irregular heartbeats and body movement during measurement, while it stores up to 14 readings for your review. The cuff fits adult upper arms 9” to 17” in circumference. NOTE: Unit operates on 4 AA batteries (not included)