EXTRA LARGE CUFF ELERA blood pressure cuff is an adjustable large size cuff, suit adult arm 13-21 inches in circumference. It has self-test function, high accuracy. SMART ACCURACY RELIABLE - ELERA blood pressure machine is equipped with the most stable chip and the most advanced technology. The measurement results are classified according to WHO/ISH blood pressure, making the readings more accurate.Additionally, there are irregular heart beat reminders. ONE Click & AVERAGE READING FUNCTION -ELERA BP meter only takes 50 seconds to accurately measure your blood pressure and heart rateand can read the average of the last 3 measurements, so it will not be affected by breathing or movement during the measurement. 2 USERS MODE & DATA MEMORY - The blood pressure monitor supports switching between 2 users. Each user can store 99 historical measurement records, which is convenient for you to track the blood pressure changes of yourself and your family. TWO POWER OPTIONS: Easily power