Olasonic USB Powered Speaker System - TW-S7(B) Delivers 10W + 10W dynamic output on USB power Plugs directly into the USB port of a PC or Macintosh computer Requires no electrical outlet Features plug-and-play capability Contains massive magnet speaker unit Delivers 10W + 10W dynamic output on USB power Plugs directly into the USB port of a PC or Macintosh computer Requires no electrical outlet Features plug-and-play capability Contains massive magnet speaker unit Incorporates high-performance digital amplifier Employs passive radiator for deep bass reproduction Utilizes stylish aerodynamic design