ADESSO Eco-Friendly Calculator AQ-421 Features dual power: solar and auxiliary battery (LR1130 / 1). Includes the logo of the Japanese Institute of Certified Public Accountants. Although unused, it has been stored at home for a long time, so the battery is likely depleted. Please purchase only if you agree to receive the item as is. The instruction manual is included, but there are two faint stains (images 6 and 7). Calculator Adesso Certified Public Accountant