Power regularly measured blood pressure, is certainly a very positive thing. Everyone should do so in order to foresee potential cardiovascular problems. This device allows us to do this regularly with ease. Accompanied by a small clear and precise manual, I had no trouble turning it on. The measure is very simple, you put it on your wrist, following the instructions in the manual and you press Start. The only element that is difficult to find the first time, it is the height of the camera with the heart. But after 4/5 measures found the right position without difficulty. In addition to the systolic and diastolic blood pressure values, it tells you your heart rate and the average values of your blood pressure and stores up to 90 blood pressure values and pulse. Measurements are given in mm, so just divide by 10 to compare them with those given by your doctor. Diastolic blood pressure is the blood pressure measured upon release of the heart. The systolic pressure is the blood pressure measured during contraction of the heart. I sincerely board this device, which does not prevent regular access to his doctor, but from the point of view, ease of use and prevention, is a real plus. Side quality, with Velcro tightening strap is excellent and made for lasting in time. Its simplicity of implementation with a preformed shell a really great. The device itself is a pretty solid set, plastics are qualities and marks only slightly. A small negative note, the storage box is really too basic.