25 Keys Usb/midi Keyboard Controller.Forty immediately accessible controls.Twelve knobs with three active layers 25-key, velocity sensitive keyboard.Great feeling, super high-resolution knobs X/Y joystick to control pitch bend / modulation or other parameters .4-character LED display. Easy template placement for virtual instuments and digital audio workstations.Twenty editable, storable configurations.Three-way power : USB bus power, external adapter (optional)