Keyboard: 37 (C scale 3 octave) standard keyboard, touch sense control: Volume, octave shift (1 up and down octave), tuning (438 - 442 Hz), Expression pedal (external pedals sold separately), Mic volume demonstration: Built-in 6 songs External terminal: Headphone output (stereo mini jack), external input (mono standard, standard jack). R), Microphone Input, Expression pedal input, MIDI IN, Power input: AC adapter, music stand, sound effect name sheet, marker