The General Music (GEM) CD1 Hyperkeyboard is a vintage 61-key portable arranger keyboard aimed at beginners, hobbyists, and home practice.

Key Specifications & Features
· Keyboard: 61 standard-sized keys (non-weighted synth action).
· Sounds: Around 127 instrument voices.
· Styles & Rhythms: Roughly 100 built-in auto-accompaniment styles.
· Effects: Basic onboard Reverb and Chorus.
· Connectivity: MIDI (In/Out) capabilities.
· Power: Operates via standard wall power adapter or batteries.

See it on Youtube.

Inclusive full manual, power supply, original transport box. Can be tested on place here, if you know to operate it.