The BM57 Bluetooth Upper Arm Blood Pressure Monitor allows for seamless tracking of blood pressure measurements using innovative bluetooth technology. The BM57 features a large, easy to read display with 2 x 60 memory spaces and an average value calculation. The colour coded traffic light system allows for easy interpretation of values and with a fully automatic inflation/deflation the unit can will alert users to arrhythmia detection with reliable accuracy. Suits upper arm circumferences of 23 - 43cm. Also features date and time, auto switch off, low battery indicator and signal in case of application error. 3 year warranty. German designed and engineered.