The Boostaroo is a patented small, pocket-size portable audio amplifier that separates the signal into individual stereo channels to drive 3 separate headsets or speakers. It will boost the volume of any portable audio device that uses a headphone jack in stereo without distortion. The Boostaroo is the only headphone amplifier & splitter on the market that delivers a 40% volume increase to any device that uses a headphone. It's patent protected, so it provides the quality and durability that you would expect at an incredibly low price. Buy a Boostaroo Portable Amplifier & Splitter, and the next time you're on a plane, in an airport, on a bus or subway, at the mall, riding your motorcycle, or even mowing your lawn, you'll be listening to music, enjoying your video game, or watching a great DVD and still hearing it in clean stereo sound.