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B31 TWS Earphones, True Wireless Earbuds, Basic Function

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P/N B31
Chipset FIYAPOO
Bluetooth Version 5.1
Single Charge Play Time 4 Hours
With Charging Case Play Time 25 Hours
Case Charging Time 1.5 Hours
Driver OD 8mm real copper ring speaker
Wireless Charger
In Ear Detection
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