This is the original Bandai Digital Monster (Digimon) handheld game, the initial green model. I haven't confirmed its functionality, and it's in its original, old condition, so please consider it a junk item. I've kept it carefully stored in a dark place, so I think it's in a beautiful condition externally. It's probably not very common in the world, and I think it's a valuable item. I can take additional photos if needed.