... connection,high quality voice,beteaful outlook SN-403 PMMA Computer sound box:Magnetically shielded:Unique cabinet noise reduction features and circuit ... speakers, 4 ohmMagnetic featureMagnetically shielded Speaker Size50×50×50mmSpeaker WeightAbout100gOther Features2 40mm Nd-Fe-B speakers, sound pure,Crystal clear appearance, ... 5V, 500MA, 50HzInput3.5mm audio interface SN-403 PMMA Computer sound box