It is sufficient to ride on noisy metro lines, such as Lublinskaya at 80-90% volume (in any other headphones I cut it to the fullest and that was not always enough), and on quiet trains or on the street - 30-50% hours a day (if there is no primary requirement that they be tied to the neck with a string). If there is no primary requirement that they be tied to the neck with a string, hours without problems and the connection does not disappear (with a Samsung Galaxy phone). When speaking over the phone, the microphones, similar to most other "gags," pick up all of the sounds around too well; nonetheless, this occurs even in relatively quiet environments.
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