What size battery do these require for the "Active Noise Canceling" feature, and is it rechargeable?
The technical specs list these earbuds as having an "Active Noise Cancelation" feature built-in. Because active noise cancelation requires power to generate "anti-noise" to effectively cancel out background noise for better sound isolation and audio performance, i'd like to know what size battery these require for the feature to work, how long the battery is expected to last under average usage, and if it's rechargeable. thanks!
- Asked by Mark O from Seattle
Yurbuds Focus Limited Edition Sport Earphones
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