Clinically Proven Accuracy: In just one sitting get accurate results for your Pulse, Systolic / Diastolic Blood Pressure, Hypertension Risk Indicator, and Irregular Heartbeat Detector Get More From Your Monitor with the Free App: Sync your readings wirelessly and gain an overview of these important vital signs; From your smartphone you can set targets and reminders to establish a healthy routine plus share results with your doctor Arm Cuff Fits Most: For upper arms that measure 8.7 in – 16.5 in (22 cm – 42 cm) in circumference; Proper fit is necessary for an accurate reading, review included getting started guide before use Storage & Averaging Technology for 2 Users: Monitor stores the last 99 measurements for each user (198 Total) and uses MyTrend analysis to show how your current measurement compares to your average measurement