Portable Bluetooth speakerType: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 1200mAh Frequency response range: 100HZ 20KHZ Output power: 3w*2 Signal to noise ratio: 75dB Power supply mode: built in lithium battery Channel: 2 Play time: 6 hours Expansion storage: 32GB Bluetooth protocol: 4. 2 Number of speakers: 2
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