2.1 speaker system with amplifier Frequency: 2.4-2.483GHz ... Material is MDF, horizontal designed, 2.1 audio, 5.25 speaker structure, undertone stronger, output is 30W3 ... and fashion in classic trend.Detail Information:Sound Channel: 2.1Sorts: Meltimedia speakerSize: MMSubwoofer: 286(L ... KnobLouderhailer: higher: 3 inch,4Ω,15W; Lower: 5 inch,4Ω, 30WLower controler: yesInterface: 2.4Gwiress receiver ...