Digital blood pressure and pulse monitors display reading of systolic and diastolic blood pressure and pulse; date and time. The WS820 Wrist Blood Pressure Monitor with Irregular Heat Detection is Clinically Proven Accurate by the German Hypertension League. Special 'M' Style Cuff. Detects Irregular heartbeat. Two People, 30 Memory each with Date & Time and Averages. Includes Storage Case and 2 "AAA" Batteries.