First, my style and the price is stabbed in the eye. I did not want Profiuhr but a simple model that the time and heart rate displays. I immediately noticed that the clock was already running when I brought them out of the box. The date and time were already set correctly, but I wonder if the battery has not already suffered a little, since these had already been fully inserted. The design of the clock, I find it very good, it is not too big and not too small, the menu easy to use. What I do not like so much that the heart rate and the time can not be displayed simultaneously. You always have to jump back and forth in the menu. But the reason why I sent back the clock: I folded the belt and wanted to show my heart rate. It took 3 minutes, until it has ever shown anything about. The value was at its own control in order. The clock beeps every time they verliert- the signal and she did all the time !!! I have the belt can be changed some time and again this cheep because of signal loss. In movement the pulse was shown, however, was always wrong. I had consistently provide a pulse of 130-150 and the washing up, you have to first) The clock thus shows a completely false pulse and is therefore completely useless for use, so back.