This is a pocket computer released by Casio Computer Co., Ltd. in 1982. Features BASIC language / Equipped with a one-chip V•LSI microprocessor Casio Personal Computer Manufacturer: CASIO Model: PB-100 Accessories: Instruction manual, How to Win with Personal Computers [Condition] This item is from the 1980s and was part of a home collection. It has been stored carefully and has hardly been used. The battery has been replaced with a new one. Regarding operation, power-on, response of all keys, and simple calculations have been confirmed. There is a small dent in one place, but other than that, the main unit and accessories are in good condition. Please refer to the photos for detailed information and condition of the product. How about it for those who have the knowledge and skills to make use of it? I believe this is an item that is rarely seen in modern times. Also suitable for retro collections♪ How about it... This is an item from the 1980s and has been stored at home for a long time. Please understand and agree to the contents before purchasing. Please refrain from purchasing if you are concerned about minor details or if you are looking for perfection... those who are nervous.