We use about 150 pieces in the company. During the first year, about 35 - 45 pieces broke, and almost all of them had a broken wire in front of the earpiece itself. In the first batch, the wires from the headphones to the remote control turned out to be with a very rigid braid and, as a result, frayed either at the headphones themselves or after the remote control. A defect was found on some headphones: when the microphone is turned on, a high-frequency squeak appears in the speakers. The arms break very often. The plastic is too brittle. Headphones are practically unrepairable. The wires are not protected from kinks, so they can not be strongly bent, but it is better to keep them always at rest.
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