Yep, a useless box. It's an oddly satisfying device. I made one, had a good laugh and then I made a few more to share the fun.
Fully assembled and comes with batteries. Price includes shipping in the US.
I only have a few on hand right now and won’t be able to make more until after the new year.
I can't think of much more to say about it - Watch the video if you’re not sure what a useless box is.