This cuff blood pressure monitor was named The Best by the Hammacher Schlemmer Institute because it provided the most accurate readings and was the easiest to use. Each monitor’s systolic and diastolic measurements were compared to readings taken by a cardiology nurse. The Best model’s results only deviated from the nurse’s by an average of 5.63 mmHg and 6.14 mmHg, respectively, while lesser units were off by as much as 10.73 mmHg. Easy-to-follow digital instructions combined with a large, easy-to-read screen, simple three-button operation, and color-coded indicators that allow you to quickly determine where results fall on the World Health Organization’s guidelines earned this model The Best rating. Panelists also found The Best model to be comfortable during inflation. With irregular heart beat detection and pulse rate indicator, it stores up to 90 readings for three users. The wide-range cuff fits arms from 8 1/2"-16 1/2" in circumference. Includes storage case and four AAA batteries.