Mini wireless bluetooth speakerType: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 300 mA Frequency response range: 40Hz 20KHz Output power: 1 Signal to noise ratio: 70db Power supply mode: built in lithium battery Channel: 2. 1 Playing time: 2 Expansion storage: 16GB Bluetooth protocol: 4. 0 Number of speakers: 1 Effective distance: 10 meters
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