The Advocate Arm Blood Pressure Monitor offers precise blood pressure readings on an easy to read display. It features a large memory capacity (up to 120) and comes with four "AA" batteries. This blood pressure monitor accurately measures systolic and diastolic pressures as well as pulse rate. · For use on the upper arm · Cuff Size¦ 9" - 12" (22cm x 30cm) · Super-low noise air pump · Four (4) "AA" size batteries · Automated shut off after 3 minutes of inactivity · Date and time display · 120 Memory capacity · Extra-Large liquid crystal display makes the result read very clear · Convenient carrying case