Introducing the Altec Lansing XT1 system. In addition to its thin, innovative design with removable stands, the XT1 delivers superb sound and surprisingly deep bass thanks to four full-range neodymium micro drivers and bass enhancement technology And just like your laptop, the XT1 knows how to travel light. Because it?s USB-powered, there?s no need for a power supply and no batteries to forget. Plug it into your USB port, press play, and you?ll be listening to the best portable sound you?ve ever heard from a laptop. Pack it up in its deluxe carrying case, and you?re ready for your next trip. Specifications Total Continous Power: 1.5 Watts RMS Front Speakers: 750 mWatts/channel @ 7.7ohms @ 10% THD @ 100 Hz - 20 kHz 2 Channels Loaded System Response: 100 Hz - 20 kHz (-3 dB) Signal To Noise Ratio @ 1 KHz Input: > 65 dB Drivers (Per Satellite): Two 28 mm full-range micro drivers Dimensions: 1.9" (W) x 1.3" (D) x 7.5" (H) 48 mm (W) x 33 mm (D) x 190 mm (H) Features Slim, portable design ? Flat panel, shielded satellites with removable stands pack easily and go anywhere. USB-Powered ? Connects easily to laptops and desktops via retractable USB cable. No power supply needed! Big Sound for Laptops ? Four specially engineered full-range neodymium micro drivers with aluminum cones smoothly deliver a full spectrum of pure, distinct sound with unprecedented signal accuracy. Quality Bass ? Bass enhancement technology creates quality bass without a subwoofer. Deluxe Carry Case ? Compartment bag included for your traveling convenience. Built-in Controls ? Include power on/off and volume. Auxiliary Input Jack ? Connect two different audio sources ? your laptop and MP3 jukebox for example ? at the same time. Minimum System Requirements PC Users: - Certified USB controller - Windows 98SE - Windows 2000 - Windows ME - Windows XP or higher MAC Users: - Apple Macintosh½ computer with builtin - USB connection - Mac½ OS X or highe