"The Logitech AudioHub has 15 watts of total power with a pair of 2-inch tweeters and one 3-inch driver for the woofer. The device is compatible with Windows 98SE, 2000, X, and Vista as well as Mac OS X or higher. The AC power cable is 6-feet long and the AudioHub includes a 2-foot fixed USB cable and a 4-foot extension USB cable."