The Bose® COMPANION5 Companion® 5 Multimedia Speaker System gives your computer an enveloping sound experience from multi-channel content without the complications of a five-speaker surround sound system. Two speakers and a hideaway Acoustimass module deliver an enveloping sound experience that brings music, games and movies to life. Easily connects to your computer through USB port. Requires no sound card upgrade, no software and no adapters. Speakers positioned on stands for quality audio performance. Control pod puts volume and mute functionality at your fingertips, while providing easy connection to an additional audio input such as a portable MP3 player. Control pod also provides headphone jack.