Synthesizer that can be played freely using the touch pad. 150 types of sound programs that correspond to all kinds of dance music. Intuitively overlay phrases. A loop recorder that also allows undo/redo. Battery-powered (Two AA, not included) and built-in speaker allows you to play anytime, anywhere. Allows beat & key changes and adding arpeggio to any sound. No software, manual or original packing included. Manual is available online through the Korg site. Can also be powered by adapter (not included)  gently used and in great working condition with very small signs of wear