3. There is no noise reduction as such. This mode turns on the bass, that is, it brings the headphones into normal sound. Bass is just weak without it. 4. The charge of the case either stops when the headphones are fully charged, then at zero. I never understood. 5. The sensor is very sensitive when touching the headphones. I turn off. 6. Micro is average, audibility for the interlocutor is not enough if you do not speak loudly.
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