JBL Creature II 3-Piece Desktop Speaker System (Aluminum) 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, discmans and walkmans - again, simply plug into the headphone jack