The Beurer Auto 400 Blood Pressure Monitor is designed for adults who prioritize their heart healt and wellness. German engineered for accurate results and simple to use features. Includes a Risk Indicator for fast interpretaion if your blood pressure is high or low, Cuff Position Indicator to check correct blood pressure cuff position, and alerts if an irregular heart rhythm is detected. Features a universal cuff that fits arms from standard size to large upper arms. Battery powered with inflation technology that gently measures your blood pressure while the cuff inflates for faster and more comfortable measurements.