Subwoofer High Volume Wireless Audio BluetoothProduct information: Function: Waterproof, dustproof, anti drop, call function Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 500mAh Frequency response range: 40Hz 20KHz Power supply mode: built in lithium battery Channel: 2 Playing time: 8 hours Bluetooth protocol: 4. 1 Number of speakers: 2 Effective distance: 10 meters Operation mode: button Play format: MP3, WMA, WAV Shell material: metal
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