The set is functional, it works while I swim every day. My problem is the consistency of the sound, when I start swimming you can clearly hear the music in both ears. During swimming, the noise level from an earbud decreases significantly over time. This happens every time I swim. After I leave the pool a few minutes later, the sound level in both capsules is the same again. This product is the best I've tried training with, but it's nothing special.
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