The VTG Casio SK-1 Portable Sampling Keyboard is a 32-key electronic keyboard made by Casio in Japan. It features a small size, black color, and weighs 2lbs 7oz. The keyboard offers synth action, has built-in effects, a speaker, and can be powered by batteries. With a mic input, and built in mic, this portable keyboard is perfect for on-the-go musicians looking for a compact and versatile instrument for creating music.

ISSUES.... (known) there could be more!

That being said, I really know very little about this item. It powers on, each function seems to work, but I'm not sure how it SHOULD work. I know when I first tried it, battery operated, the keys played but sounded slowed down or "whining". I have read it could be a power source issue, but from what I can actually see I don't see corrosion or possible battery damage, but it takes 5 or 6 AA Batteries and I didn't investigate beyond what you see in the photos, and I understand it could also be a couple of other fixable problems.

Also there is a built in mic, I'm not sure if it's supposed to record unconnected external audio such as a person singing, but this one did not, this could be Operator Error as it does not come with a manual and I don't want to look it up, my disinterest is your gain, I simply would like it to go somewhere and get some good use!