2.1 speaker, speaker, active speaker, computer speaker, pc speaker box,subwoofer speaker box,RMS:15W+10W*2 Driver unit:4"+3"x2 Features Specifications: 2.0 speaker (T8) ModelT-4Driver Unit4"+3"×2S/N Ratio65dBImpedance4ΩPower15W+10W×2F/R20Hz-18KHzN.W G.W**kg/CTN,1pair/CTNFinishedPVC with PaintSpeaker dimension Package dimetion 2.1 speaker, active speaker, computer speaker