... connection,high quality voice,beteaful outlook SN-101 PMMA computer speaker:Magnetically shielded:Unique cabinet noise reduction features and circuit design ... Nd-Fe-B high-quality speakers, 4 ohmMagnetic featureMagnetically shielded Speaker Size50×50×50mmSpeaker WeightAbout100gOther Features2 40mm Nd-Fe-B speakers ... ~ 5V, 500MA, 50HzInput3.5mm audio interface SN-101 PMMA computer speaker