Come and see our amazing products. Adopted advanced chips and technology to provide you the systolic and diastolic pressures readings as well as pulse rate readings, each bp monitor is individually checked and tested to ensure its operating performance. The irregular heartbeat symbol will show up when an irregular heartbeat is detected. The Large size blood pressure cuff fits arms 8.8" to 19" (22cm - 48cm) in circumference. A diagrammatic drawing on the cuff makes it easy to wrap. 2 Power sources supported, AAA Battery or connect to USB cable, batteries are not included. Pls confirm with us about the packing info, stock status and exact production time before placing your orders.