P21 wireless bluetooth speakerType: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 1800 mA Frequency response range: 100HZ 20KHZ Output power: 10W*2 Signal to noise ratio: 75dB Power supply mode: built in lithium battery Channel: 2. 1 Expansion storage: 32GB Bluetooth protocol: 4. 2 Number of speakers: 2 Effective distance: 10 meters Function: insert card, voice prompt, call function Operation mode: button Play format: MP3 Shell
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