Wireless Bluetooth speakerType: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 300 Frequency response range: 100HZ 20KHZ Output power: 3W Signal to noise ratio: 75dB Power supply: built in lithium battery Channel: Single speaker Playing time: 2 hours Extended storage: 32GB Bluetooth protocol: 5. 0 Number of speakers: 1 Effective distance: 15 meters Function: audio input, voice prompt, card, radio, call function Mode of
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