This is the Sanwa Supply protective case, PDA-SF5BK, for Microsoft Surface Go 1 / 2 / 3 / 4. I am selling this due to replacing the main unit (Surface Go 2). Product Number/Model Number: PDA-SF5BK Manufacturer: Sanwa Supply Reference Price: 4,950 yen (tax included) This product was purchased new in September 2022 and has been used for about three years. Please consider this item if you understand that it is a used product. * The item for sale is the protective case. (The main unit and keyboard are not included.)