Advanced accuracy helps ensure consistent, precise readingsEasy one-touch operation allows home blood pressure monitoring to be both simple and accurateContoured cuff design wraps the arm for a more comfortable measurement. Fits standard and large adult arm circumferences from 9 to 17 inches14 memory storage allows you to review the last 14 readings with a simple touch of a buttonDetects and alerts you of irregular heartbeats while your blood pressure is being measuredOperates on 4 AA batteries (not included)