Well, unfortunately, does not last long

ordered the clock, was quite satisfied first. It is convenient and the belt fit me just so (could be even narrower). After one month, the clock began to lose contact again and again, first only for about 5 minutes. After two months of use, however, I can wegschmeisen the clock. Stimulates me to the training more than that this clock brings something. They constantly lose contact and shows no pulse at, sometimes even more than 1 hour. Have no more at this fun clock, for me no good quality.