I've been using them for over a year. Everything would be fine. But! Synchronization is only with the right earpiece. That is, the left one will be connected if the right one is connected. If the right one is discharged, the left one will also turn off. I consider this to be a serious oversight. I only use one earphone. There is neither the possibility nor the need to use two rhinestones. As a result: the right earpiece with a very tired battery, slightly worn out. Left new in every sense. The right one will die or lose, the left one can simply be thrown away. On its own, it's useless.
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