ELECTRO-MATIC INDEX I believe this product is from the 80s or 90s. It's an electric address book. It's designed to move a scroll that you've written on yourself using a motor after disassembling it. I think it has more collector's value than practical use nowadays. *I have confirmed its operation by inserting batteries. It works without any problems. For those who can accept a product stored by a non-professional, no returns or refunds, please. Please consider only if you understand. It's quite old and a rare item, and according to AI search results, it seems to be made by Tsukuda. It's an electric address book for export, and the instruction manual is only in English. *The following are the results of the AI search: Manufacturer: Tsukuda Original Product Name: Electro-Matic Index Features: Pocket-sized for excellent portability. Equipped with a one-touch list search function. Operates on 2 AA batteries (sold separately).