midiplus Classic 25 MIDI Keyboard Controller USB master keyboard with 25 full size keys, octave +/-, pitch bend and modulation wheel, 8x knob controllers, LED display, USB bus powered, connections for optional sustain pedal, includes USB cable. Color: Black 6 x AA size battery for portability. MIDI socket: Keyboard MIDI Out USB and Keyboard MIDI Out USB B type: USB connect to Computer Other socket: Sustain jack 6 x AA size battery for portability ATTACHMENT: Owner's manual, USB cable