These headphones have a peculiarity, when you swim, for example, crawl and turn your head to the side to inhale, the volume “beeps” in the headphones as if they were tapped with a finger. The same thing happens when you swim breaststroke and your head enters the water. In general, these "beeps" from false "taps" at first infuriated, but after a while I got used to them. I dry the headphones before charging when I come home, but after about 6 months (when using about 1 time per week), corrosion appeared on the contacts - you can look at this "patina" in the attached photo.
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