Bone Conduction Speaker Hummingbird Speaker Bone Conduction Audio Speaker Bluetooth TWS Wireless Audio$14.02
Bluetooth adapter
$4.05
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商品詳細
Interface USB plug and play or not plug and play
External power supply
Transmission rate 21 (Mbps)
Effective working radius 10 (m)
Bluetooth standard 4.1
Working frequency: 10 (MHz)







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