Boost the volume to your headphones from any music source! Find it hard to hear your CD player or laptop DVD on an airplane, in traffic, or on the bus? The Ultra Booster is a pocket-size portable audio amplifier/splitter that will give anything that uses a headphone an extra volume kick. Simply plug it in where you normally plug in your headphones, then plug your headphones into the Ultra Booster, just like it was a small extension cord...and your problem is solved! The Ultra Booster works with all kinds of audio sources (MP3 Players, CD Players, laptops, Gameboys, portable TVs, DVD Decks, etc.), and you still control the volume on your device the way you did before...it just goes louder now! The Ultra Booster is tiny, too, not much larger than the two AA batteries that power it. Watching a DVD and have a friend that wants to listen too? For those times when several people want to listen to the same source, the Ultra Booster has another great feature...3 headphone jacks, each with it's own amplifier circuit, which lets up to 3 people listen simultaneously without dropping the volume for the others (as would happen with a simple "Y" cord). The Ultra Booster is also dramatically better than all of the "first generation" headphone boosters we have tested which introduced significant "hum" into the audio signal. Ultra Booster delivers crisp, clean audiophile sound...don't settle for less. Boost the volume on any audio source that uses a standard headphone jack No sound distortion Allows you to share your player with up to 3 people with no loss of volume or sound quality Helps you hear over airplane or road noise Lasts up to 160 hours on a pair of AA batteries (somewhat less with more than 1 pair of headphones plugged in simultaneously) HW-UBST2List: $99.99Sale Price: $49.99 Hot Products - Great Prices - Great Service - Fast Shipping