I don't know what it is but this cat's green glaring eyes hypnotize me every time! Really cool vintage Halloween decoration. The little white tab you see in the last photo was actually inserted in the battery pack so I don't believe the cat has ever been used. As soon as I pulled that out and squeezed the cat it played a cute little tune. There are no words; it is an instrumental song. Really unusual decoration. I have another from this series who is a skeleton. Or I do have it as of this listing. Feel free to check and see if it is still available. I will combine shipping if you want both.