Beurer BC 50 Wrist Blood Pressure Monitor makes at-home blood pressure management easy and convenient. This extra-slim medical device features an extra-large, easy-to-read display. It also stores up to 60 readings, calculates the average for all stored readings, as well as the preceding 7 days' morning and evening readings. With arrhythmia detection. Made to fit wrists measuring 13.5cm-23cm in circumference.