The thin, lightweight XT2 system delivers excellent sound that comes from four full-range neodymium micro drivers and bass enhancement technology. The XT2 can be powered by your laptop but comes with its own power supply for an optional audio boost. What's more, it's compatible with the BB2001 subwoofer, for those who really want thumping, full-bodied sound. Built-in metal stands keep the speakers upright in almost any setting. And the XT2's built-in microphone is perfect for Internet communications. Deluxe carrying case included.