I found something I used in my student days at my parents' house. It's from 2003. I couldn't find any accessories, so this is just the main unit. It seems the part that contacts the battery has rusted, as shown in photo 4, probably because I left the gum battery in it for 20 years. It doesn't work with a gum battery, and the operation hasn't been confirmed. There's a dent on the back, and there are many scratches overall. There are also parts where the tabs are missing because I used my fingernails to open the battery cover. This is a junk item because it hasn't been operated for 20 years and its operation hasn't been confirmed. I cannot provide any warranty even if it doesn't work with AA batteries, etc. It will be shipped via Nekopos. Thank you for your understanding.