Laptop sound pad with Built-in 2.1 Speakers & Cooling Fans Features l 2.1 Stereo: four 5W speakers & one 10W subwoofer. l Powered through USB from your notebook or 4 Size-D batteries l No additional software or driver needed. l Built-in ultra-silent cooling fans. l l Audio Input for MP3 players, Portable DVD players, and Game consoles l Works with all laptops l Control buttons: Power On/Off, Fans On/Off, Mute, Volume Down, Volume Up l Compatible with Win98 SE/ Win ME/ Win 2000/ Win XP/ Win Vista and MAC OS9/O