The Beurer BM 55 blood pressure monitor. Fully automatic blood pressure and pulse measurement on the upper arm. Easy to read white illuminated XL display with illuminated START/STOP Sensor-Touch buttons. Average value of all stored measurements and morning and evening blood pressure for the last 7 days; 2 x 60 memory spaces. With WHO indicator (classification of values according to WHO guidelines); Arrhythmia detection: warning in case of possible heart rhythm disturbance; Medically certified product. For upper arm circumfrences from 22 - 36cm; Date and time; Automatic switch-off; Signal in case of application error; Automatic pressure preselection and deflation; Blood pressure passport. Battery changing indicator; Practical storage pouch. Including 4 x 1.5V AA batteries. Size H10, W13.1, D19.7cm. Weight 0.76kg. Batteries required 4 x AA (included). Manufacturers 5 year guarantee.