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Bluetoothのヘッドホーンを取り消す携帯用および折り畳み式の40mm Dia 118dBの騒音 製品仕様書: Bluetooth:V5.0電池容量:300mAh話の時間:7-8時間;音楽時間:5-8時間;待機時間:180時間;充満時間:2時間;周波数応答の範囲:20Hz-20KHz感受......