25-key USB-MIDI keyboard controller with the best key action Compatible with any system ... Slider, Pedal, Pitch Bend Wheel, Modulation Wheel, Up/Down Buttons, Knobs. 3.PC PC upload and download, compatible with Win ... USB interface, pedal interface(for a switching or continuous pedal controller ) 5.Power 9-12V power interface,Power on/off ... more information. OUR FACTORY 25 key USB MIDI keyboard controller