No. 1 doctor and pharmacist recommended home blood pressure monitor Manage and track your last 120 readings on your smartphone, compatible with Apple iPhone® 4S & higher, iPad®3 & higher, iPad® Mini; iOS 7+, Samsung Galaxy S® III & higher; Android(TM) OS 4.3+ Comfortable and simple to adjust, the pre-formed ComFit Cuff inflates around the entire arm to avoid incorrect cuff positioning ensuring a precise reading and expandable cuff fits medium and large arms Multi-colored indicator lights clearly show how your reading compares to normal home blood pressure levels Feel empowered by accuracy with exclusive technology that automatically displays the average of your last 3 readings taken within the last 10 minutes and detects irregular heartbeats