The Omron 5 Series Blood Pressure Monitor is powered by Omron Advanced Accuracy technology which measures five times more data points for more consistent, precise readings. This Omron-exclusive technology minimizes the impact your breathing and movements will have on your blood pressure reading results thereby helping to reduce measurement inconsistencies and errors. It will also measure, store, and let you review 60 readings for one user and includes a wide-range (9-17 inch circumference), D-ring, arm cuff, but when used with the free Omron Connect app, it can support unlimited users and store unlimited blood pressure readings thereby allowing you to conveniently view your trend graphs and charts and share them as needed with your family, caregivers, or doctors. The Omron Connect app works with iOS and Android devices as well as Amazon Alexa via the Omron Health Skill. This unique blood pressure monitor uses the oscillometric method of blood pressure measurement which means it detects blood movement through the brachial artery and converts the movements into a digital reading, and it alerts you instantly if an irregular heartbeat is detected while your blood pressure is being measured and automatically displays the average of your last three readings taken within 10 minutes.