CASIO 12-digit Calculator JS-20WK This calculator was previously used for work. It is recommended that the internal battery, CR2025, be replaced. We are looking forward to your purchase if you understand that this is a used item. Thoroughly pursues the needs of professionals, including accounting, finance, bookkeeping, and financial institutions in general companies. Superior performance, such as excellent fast-typing design, operability, and visibility, strongly supports your work. Verification type. 12-digit display.