Item is in good shape, has case wear and dirty battery box.
The 12 semi- OBS preset sounds and chords employ Casio's classic "Consonant Vowel" synthesis engine (see Casio CT-410V), which mixes 2 stair shaped waveforms with independent volume envelopes and can make nicely warm and sonorous sounds. The 12 semi- OBS preset rhythms are made from woody knocking medium resolution samples (same percussion like with Casio CZ-230S); the rhythms consist of 4 separate tracks, those each have a slide switch for 3 variations and mute, which permits a lot of realtime variations. Also the warm sounding accompaniments have each 3 variations and intro, fill-in.