Since I bought it as a gift, they did not check it right away, only at the time of donation, after 3 weeks. As a result, the item could not be returned. You'll have to take it to a service center. The problem is with the left earpiece. At first it did not work at all, after resetting the settings it worked, but it discharges very quickly. A very embarrassing moment, of course. Moreover, the headphones were bought as a gift.
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