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Karen 1. 3-5hours 2. Passive noise cancelling, without noise cancelling chip.

2019-01-29 04:18:57 Helpful (1)
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Huyaxin It's DSP noise reduction ,the playback time is about 3-4 hours.

2019-01-24 08:08:21 Helpful (0)
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Huyaxin Hello! First of all, this is not cvc 8.0. Secondly,the product supports bilateral calls, and the third can be used for 2-3 hours at normal volume. The fourth IPX45 is waterproof and dustproof.

2019-01-24 07:42:19 Helpful (0)
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