Casio Computer Co., Ltd. is a multinational electronics manufacturing company headquartered in Shibuya, Tokyo, Japan. Its products include calculators, mobile phones, cameras, musical instruments and watches.

CASIO KX 101 Boombox with built- in mini- keyboard one of the rarest and most mythical Casio instruments, about that tremendous nonsense has been told on the internet.

Features :

37 mini keys
12 key buttons + 11 select buttons for direct selectable single finger chords
2 detachable 2-way loudspeaker boxes (with some bass, tweeter is slightly hissy)
main voice polyphony 4 notes (only 1 in unison mode)
9 preset sounds {piano 1..3, harpsichord, organ, clarinet, flute, horn, mellow}
12 preset rhythms {waltz, ballad, swing, enka, 16beat, rock-1..3, disco-1..2, bossa nova, samba}
preset sounds, rhythms & sequencer note lengths selected through keyboard keys
cipher buttons {'0'..'9', 'set', 'c'} (only used by tape deck?)
main volume slider
treble & stereo balance sliders
separate volume sliders for poly (keyboard main voice), mono, chord, arpeggio, rhythm, mixing microphone
stereo/ mono switch
tempo +/- buttons (57 steps, most are slow)
transpose +/- buttons (13 semitone steps)
arpeggio