Thank you for viewing. The package is slightly dirty, but the item is new and unopened. Brand: CASIO Color: Black Calculator Type: Scientific Calculator Power Source: Battery-powered, Solar-powered Number of Batteries: 1 Alkaline button battery Manufacturer: CASIO ● Digits: 1 ● Memory: 9 ● Power Source: T・W・P (Combination of solar and auxiliary battery) (LR44) ● Number of Batteries: 1 ● Battery Life: Approximately 2 years ● Size (Depth x Width x Height) mm: 162 x 8 x 11.1 ● Weight (g): 95 ● Functions: Natural textbook display (output setting switching) Easy-to-use center cursor key Product Model Number: fx-915ES-BK-N Size: 1.10 x 7.99 x 16.19 cm Product Size: 1.11 x 8 x 16.2 cm; 95 g Please understand that this item has been stored at home.