Mini Waterproof Bluetooth SpeakerSpecification: Type: Bluetooth speaker connection method: Bluetooth connection interface type: Usb battery capacity: 300mah frequency response range: 100hz 20khz output power: 3w signal to noise ratio: 75db power supply: Built in lithium battery channel: 2. 1 + 1 duration: 6 hours extended storage: Not supported bluetooth protocol: 4. 1 number of speakers: 1 effective distance: 10 meters function: Waterproof, voice prompt, dustproof, call function
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