This is an electric nail file set from Combi. I purchased it new on Amazon around December 2023 and used it about twice. Operation has been confirmed, and the light also works. (Panasonic batteries are included in the main unit.) I couldn't get the hang of it, so I'm offering it to someone who can use it. It can also be used to care for adult nails. Retail price: 4378 yen (tax included) The instruction manual is also included.