For peace of mind, many doctors recommend keeping regular track of your blood pressure and heartbeat. And its so easy to do, at home, with this all seeing and speaking monitor. The talking function even tells you where to position the cuff, before announcing your results out loud. Stores up to 99 results for 2 different users, so if you prefer to keep your blood pressure quiet, simply switch off the speaker and read it to yourself on the large LCD display. 4 xAAA batteries (not included). Automatic power-off after 1-minutes inactivity. Upper-arm cuff circumference, 22-32cm. L12.5 x W10 x D5.3cm.