mk-249 (pro 49 usb) a great value usb music making solution ideal for the beginner or professional wanting to produce music on their pc. 49 full-size touch sensitive keys, usb compatible (comes with usb cable plus pc and mac drivers), unique evolution instant data input system, 3 digit led display, pitch bend wheel, assignable slider and modulation wheel, 10 non-volatile memories (no battery required), provides usb to midi interface, standard midi out. with all new software pack including music planet and sound studio.