Waterproof Bluetooth speakerType: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 3000mah Frequency response range: 100HZ 20KHZ Output power: 30W Signal to noise ratio: 75dB Power supply mode: built in lithium battery Channel: 2 Playing time: 12h Expansion storage: 32GB Bluetooth protocol: 5. 0 Number of speakers: 2 Effective distance: 10 meters Function: insert card, waterproof, dustproof, drop proof, voice prompt, call function
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