... portable USB speaker 2.Support TF,USB DISK, FM, lyric synchronization TF card portable USB speakerFeatures: 1) for use at the office ... be powered either through PC, AC adapter or batteries5)Support TF,USB DISK, FM, lyric synchronization6) Frequency: 80-2000HZ7)Power: 4 ... )Size: 220×40×70(MM)9)G.W.: 0.44kg TF card/USB disk portable USB speaker