Wireless bluetooth speaker subwoofer

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Type: Bluetooth speaker Connection method: Bluetooth connection Battery capacity: 4000 Frequency response range: 60Hz-15KHz Power supply mode: built-in lithium battery Channel: 2 P lay time: 6 hours Expansion storage: 32GB Bluetooth protocol: 4.1 Operation mode: button Play format: MP3 Shell material: metal Power supply mode: USB Show more