... Light 3.Frequency: 40Hz-20KHz 4.Speaker unit:4"+3"*2 2.1 speaker, computer speaker, multimedia speaker, USB speaker, MP3 speaker ... speaker,portable speaker,bluetooth speaker, vibration speaker, speaker box, speaker system, subwoofer speaker,karaoker speaker.2.1 Multimedia Speaker Specification:Model ... power:4W×2Frequency: 40Hz—200Hz Frequency: 150Hz—20KHzunit: 4"/4Ωunit: 3"/4ΩS/N: ≥50 dB S/N: ≥76 ...