... by USB, no battery requiredCompliant for Windows XP/Vista and Mac OS X, without additional driverSupport hot plugCompatible with Cakewalk, Sonar, Cubase , Nuendo ... of RAMOne available USB portHeadphone or speakerWin XP/Vista or Mac OSXCakewalk , Sonar ,Cubase, Nuedo or any major sequencer softwareOne Package ...