* 272 midi messages can be sent* state of the art “touch sensitive inch and “high resolution inch jog wheel.* world first: innovative “deck select inch rotary switch. Use it to control 4 decks at once.* 4 rotary encoders with led rings and “push to switch inch function for ultimate control over fx effects filters samplers..* 21 push buttons 18 back illuminated for clear vision in dark zones.* shift push button allows all other controls to perform more than one function.* special size and shape to be used with dj hardware mixers.* self powered. The kontrol one usb connector allows it to be powered directly from a compatible usb bus.* strong metal case and high quality components ensures a significantly longer lifetime.* win mac and linux compatible. the kontrol one is a professional dj midi controller designed specifically to enjoy the functionality of the most advanced dj pro softwares in the world. Kontrol one will satisfy the needs of the djs that still want the tactile experience of djing with digital media in computer based systems. With a touch sensitive jog wheel scratching experience will never be that easy. Kontrol one for total control.