Construction errors. I would not buy these. Too bad because for the price they are comfortable and have a decent sound. And a nice long cable. However, as you can see from the attached photos, with minimal stress, both sides broke in the same place. I used crazy glue to glue the other side back. I do the same with the second gap. It seems that the point where most tension is felt is at its weakest on these headphones. Whoever designed them did a bad job.
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