4.0 with Built-in MIC Bluetooth version:4.0 Size: 180*68*68mm Battery: 7.4V/2000mAh Output power: 8W Working time: 6-10 hours Function:Handsfree,
W-KING Superior sound quality 70W output waterproof wireless
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W-KING X6 BLUETOOTH WATERPROOF SPEAKER, X-BASS WIRELESS SPEAKER