Actually I have bought several times the same brand headphones but for some strange reason I think they might be defective as this is the first time I have bought headphones where one side doesn't quite work . There was no problem opening the package, but once I plugged it in there was no sound on the left side. It took a while, but I had to move the plug just to get one to work. Sometimes he works when he wants to work. I usually run into this problem after a while, but on my first day of use they just didn't work properly. Don't get me wrong, these are good headphones, I'm just unlucky enough to get the wrong one.
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