Casiotone Casio MT-45

49 midsize keys,
8 note polyphony (but left keyboard section stays always in manual bass/ chord mode, thus only 31 keys usable for main voice)
4 note polyphony in chord section, separate knobs for main and rhythm + accompaniment volume
tempo knob
8 preset rhythms {pops, disco, 16beat, swing | samba, beguine, tango, waltz} selected by a 4-step slider + switch
8 preset sounds {piano, elec. piano, organ, pipe organ | harp, accordion, clarinet, violin} selected by a 4-step slider + switch
mode switch {manual bass, fingered, casio chord}
switch for 2 bass timbres (squarewave based)