The Alesis QX25 has 25 velocity-sensitive keys/8 assignable controls and 4 great feeling pads. It is ideal for controlling your Mac/PC or iOS music software as well as other hardware units. It includes Pitch and Modulation wheels/octave up/down buttons and the ability to send program changes directly from the keys. The Alesis QX 25 can even be split into sections to control multiple instruments at once. In addition the QX25s comes bundled with Ableton Live Lite Alesis Edition software.