AccuFit Extra Large Cuff Fits Arm Sizes 16.5 – 23.6 Inches (42 – 60 cm) High performance Motor for Superior Performance LCD display shows Time, Date, Blood Pressure and Pulse Pressure Rating Indicator on Display Explains what the Readings mean Features Irregular Heartbeat Detector, 60 Memory Recall and HeartWise Technology that insures a more Comfortable Measurement