Yamaha - PSR-36

The Yamaha PSR-36 is a late-1980s portable keyboard synthesizer known for its built-in FM synthesizer, which allows for sound customization via sliders for envelope and other parameters. It features 61 touch-sensitive keys, a drum machine, auto-bass accompaniment, stereo speakers, and MIDI connectivity. While offering a variety of preset sounds, its primary strength lies in its ability to modify and create new sounds using its digital FM synthesis engine, making it a popular tool for songwriting and production for amateur and professional musicians alike.

Tested, works a treat.