HP S7000 2.1 Speaker System (K7S76AA#ABL) The heart of this audio system is the compact yet robust down-firing subwooferincluding a 4-inch driver and delivering exceptional deep bass without distortion. Three-piece speaker system - feel the power of 16 Watts RMS and 60 Hz to 20 kHz frequency, with the precision of the finely-tuned satellite speakers calibrated to match the subwoofer Connection is simple with universal 3.5mm audio cable and power connection with included DC 12v 1.5A adapter and cable Share the audio sensation from your smartphone, tablet or PC, or enjoy your own private listening with the headphone jack Subwoofer has prominent raised feet for full audio flow Speakers include 2-inch drivers and 4-inch driver within the subwoofer Loud performance at &gt;= 88 dB sound pressure level