Why the call button on the wire is needed is unclear; it did not work on Skype Portable. There is no marking which earpiece is left and which is right. It was experimentally found that the earpiece with the microphone is the right one. Perhaps this was done on purpose, so it's not a disadvantage. Its pros: Good sound, quality materials, the microphone can be bent if necessary, but it works well anyway. Convenient volume control on the wire. Cons: Headphones are designed for a small head, on the male head, after an hour of wearing, the ears already hurt a little.
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