Altec Lansing VS2121 2.1 Computer Speaker System (3-Speaker, Black & Silver) Compact 2.1 PC speaker system with stereo speakers and a powered, front-firing, long-throw 4-inch subwoofer in a ported, wooden cabinet SFX (Sound Field Xpander) Technology widens the stereo image at the touch of a button 6 watts x 2, plus 16 watts for the subwoofer; built-in controls include power on/off, volume, and the SFX switch Wall-mountable speakers broaden placement options; stereo headphone jack affords private listening Shielded satellites for distortion-free use near video monitors or TVs