Califone DMS1 delivers room-filling sound as a practical alternative to more involved audio amplification solutions. This 3-piece speaker system is designed for fast and easy classroom setup with plug-and-play convenience from any existing audio device (computer, MP3 player, or the headphone output from a multimedia player). It"s Mac or PC compatible - all that"s needed is to just plug in the speaker jack from the audio source and connect each satellite speaker to the subwoofer.