Omron eliminated the tubes and wires, making Evolv our most portable upper arm monitor ever; Its compact, one piece design features simple, intuitive controls make it easy to set up and useWith advanced accuracy, our exclusive heart health algorithm, this innovative, upper arm one piece blood pressure monitor measures more data points and eliminates interference from movement for more precise, clinically accurate readingsWorks with the free Omron app (with select iOS and Android devices) and allows you to track/share unlimited readings and results with family or healthcare providers [App also allows unlimited users]Omron is the #1 recommended home blood pressure monitor brand by doctors and pharmacists for clinically accurate home monitoring, and the #1 selling manufacturer of home blood pressure monitors for over 40 yearsNote: Blood pressure varies constantly due to many factors including stress, time of day, and how you wrap the cuff, may affect your blood pressure