Automatic Arm Blood Pressure Monitor with Smart Measure Technology and Two Arm Cuffs features Smart Measure Technology for clinically proven accuracy; Includes 2 arm cuffs to fit virtually all arm sizes; Jumbo size digits for an easy to read display; Risk Category Index compares readings to criteria established by the U.S. National Institutes of Health; 100 Memory recall/2 users; Date & time stamp and memory averaging function; Batteries and storage case included. 4 AA batteries.