We bought the "self-test" a sphygmomanometer, so you can watch it by myself just as it is with health. The device is easy to use, the manual is thorough and the remainder is written to the device, the duration is less than one minute to the final result, including fast genug.Das display is easy to read. The unit offers a variety of features, including a live detection of arrhythmia, we are very satisfied. The battery consumption keeps sch in boundaries (still the first set in it) and already determined measured 200 times! I would have liked a more stable storage so you can store it safe, so it is only housed in a cloth bag. Therefore only 4 stars, otherwise there would be 5