It appears that 3 LR-44 batteries are required. I have not confirmed the operation (whether it lights up with batteries inserted). There is a possibility that it is broken. I will sell it as a junk item. Originally, when you press the button, it is supposed to fully expand (transform) like the image of the box, but currently, when you press the button, it only expands to the state shown in the last image. However, it can be transformed by hand as shown in the image. This is an old item and has been stored for a long time, so returns are not accepted. Please purchase only if you are okay even if it is broken. There are stains and small scratches. Please refrain from purchasing if you are a perfectionist. It will be shipped via Yu-Packet Post Mini.