25-key USB-MIDI keyboard controller with the best key ... with initial touch,multi-functional keyboard 2.Funciton Assignable Slider, Pedal, Pitch Bend Wheel, Modulation Wheel, Up/Down Buttons, ... hot plug supporting4.Interface MIDI interface,USB interface, pedal interface(for a switching or continuous pedal controller ) 5.Power 9-12V ... for more information. OUR FACTORY 25 key USB MIDI keyboard controller