Yamaha PSS-130 in great condition. 32 mini keys polyphony 2 voices 8 OBS preset sounds {clarinet, electric guitar, violin, oboe, xylophone, piano, banjo, harpsichord} 8 OBS preset rhythms with interesting percussion {pops, disco, latin, 16beat, swing, slow rock, march/ polka, waltz} demo button (monophonic "Yankee Doodle") tempo control (16 steps?) simple sequencer (monophonic record & playback, but it can play together with both keyboard voices) volume control (4 steps) sound generator is digital squarewave (crystal clocked) drums are digital squarewave {medium blip, low blip}, cymbal/ hihat = metallic digital waveform CPU="Yamaha YM2410, 76 07 85 E" (24 pin DIL) alarm tone (2 notes) warns to save batteries. Yamaha PC-100 (missing the on/off button, still working without) in used condition. 44 midsize keys key lighting with 30 red & yellow LEDs above the main (non chord) keys slot with a tape head for reading PlayCards main voice polyphony 8 notes (only 4 with accompaniment) 10 semi- OBS preset sound {organ, trumpet, clarinet, piano, guitar | piccolo, violin, oboe, harpsichord, vibraphone} selected by 5 locking buttons + bank a switch button. 10 semi- OBS preset rhythms {march, waltz, jazz rock, swing, rhumba | disco, slow rock, 16 beat, bossanova, samba} selected by 5 locking buttons + bank a switch button. locking push button switches to select sounds and rhythms single finger accompaniment (manual organ chord with rhythm off) 2 switchable accompaniment variations per rhythm sustain, single finger chord & variation buttons master volume slider sliders for auto bass-, arpeggio- and rhythm volume (each 8 steps?) tempo slider transpose knob (-5..+6 semitones) sound generator layers 2 static digital waveforms with independent envelopes, which sounds quite bright and a bit harsh; with low notes sample aliasing gets audible. The trumpet, violin, oboe and piccolo have a delayed vibrato that fades in only after the sustain phase of the envelope begins. The drums sound like squarewave blips, the hihats sound somewhat metallic and may be shift register noise or a very low- res waveform sample. jacks for line out, AC adapter and analogue volume pedal Fast & Safe Shipping