mobile and unobtrusive device, exactly what I need

It's true what the other reviewers write: For accurate measurement, the unit must be at the level of the heart on the arm bent. This is not the case, then the device reports this but nevertheless measures blood pressure. The unit also discovered a few other states that would inhibit the measurement, for example, hand movements, lack of relaxation and improper attachment of equipment. Annoy me these messages? No, not at all, a doctor would also criticized precisely these things and the measurement is repeated. To me these messages make a good impression because it is correct and because they help me in carrying out the measurement.

Other reviewers praised the practical packaging of the device. You're right, the small device can be packaged very robust and therefore I was able to the device even take to work and also to older relatives to whom I could show the ease of use.

A controversial point of the reviewers was the question of whether you can use batteries to supply power. The manual says no, but probably it will still work. The supplied batteries should last for allegedly 250 measurements. That's quite a bit and I have yet to have to carry out any battery replacement.

Nevertheless, I have a criticism of the batteries. The battery cover is difficult to open, I broke a fingernail me when I tried to install the batteries. It's annoying but a little.

I highly recommend this device wholeheartedly. I would buy it again at any time and find the price reasonable. In the first measurement on the arm of my father, the device has indicated an immediate concern value at the WHO indicator (at the top in the red zone). And indeed then was to my father that he felt unwell for several hours and had severe headaches. Then he lay down on his bed for some time and 1 hour later the WHO indicator was quite scarce in the green zone. These are just plausible readings.