Yamaha pss-270 Electronic keyboard
december 1986 release
49 mini keys

Awesome machine, so many great fm sounds
one of my favorites, always have one on the stand

in excellent condition,
With power supply,
Owner's manual on flash, pdf file,


Ships at 6 lbs, 8 oz

It has 100 preset voices based on a 2 operator FM synthesizer chip (the Yamaha YM2413) that can be slightly altered with sustain, vibrato, portamento or "stereo symphonic" effects.
There are speakers on board but it does provide stereo output RCA connectors, along with a headphone jack. It can run on batteries or via an external power adaptor.
No drum pads, but a pre-recorded rhythm section is available, as well as some basic accompaniment.