Frequency interference does not prevent you from getting really nice sound. The cost seems excessive in light of the flaws. These are some advantages: Build quality, typically decent audio quality, and perceptible nuances in compositions. There is at least an 8-hour battery life. Cons: Because the high frequencies are too high, the sound "C" greatly cuts the ear in songs and videos. To fix this, use the equalizer. When the head moves, the wire occasionally clings to the end of the rim and the earphone may fall out (it was possible to make the ends sharper so that the wire does not cling).
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