I bought the machine because I wanted an instrument with upper arm cuff. What convinced me the background of the company. BOSO which also produces equipment for Verwenduntg in clinics and doctors' offices. The device is working properly and can be operated very easily. By 2 separate control buttons, the entry for a 2nd person is easily doable. When evaluating ability find it then but significantly. A transmission of the measured data into a table is only possible if you write the values handwritten directly after the measurement. When evaluation mode, the individual measured values are displayed only briefly. There is no way the values manually cycle through. In addition, missing a time and date display. This is favorable in prior art devices. Secure a good instrument for measuring the blood pressure, but with too little comfort for detecting the data. At this price I would have expected more.