Knowledge is power especially when it comes to your health. The Sanitas SBM21 Upper Arm Blood Pressure Monitor is ideal for accurate blood pressure monitoring anywhere, anytime! Features include full automatic inflation and deflation operation taken from the upper arm, Arrhythmia detection for possible heart disturbance, reliable data, 4 x 30 memories, huge, easy to read LCD display, large buttons for ease of use, fast measurement period, date and time settings, battery change indicator, and a comfortable cuff for upper arm circumference from 22 - 30cm. The Sanitas SBM21 Upper Arm Blood Pressure Monitor puts you at ease with reliable information in the comfort and privacy of your own space. Includes practical zip lock storage/travel case. Batteries Included. German Design and Engineering!