JBL Creature II 3-Piece Powered Speaker System Right satellite features unique Capacitance Touch volume control buttons Bass and treble are adjusted via controls on the subwoofer Both satellites have downfiring green LEDs, for a cool desktop look in minimum lighting environments Compatible with any Windows or Macintosh desktop or laptop personal computers equipped with audio output or a headphone jack Also great to use with portable MP3 players and CD players -- simply plug into the headphone jack