Easy to use BP monitor features advanced inflation technology - it takes your reading during cuff inflation, resulting in faster measurement time and less time with your arm compressed. Clinically accurate results in under a minute. Measures systolic and diastolic blood pressure. Irregular heartbeat detection. 2-user memory bank stores up to 120 readings. Fits arm size 8 ½" - 12 ½". Uses 4 AAA batteries (included).