This is a CASIO scientific calculator. The model number is CASIO fx-992s. It hasn't been used much, but there are some minor scratches on the screen. Please understand that there may be scratches and stains that do not appear in the photos, so please purchase only if you fully understand this. Please consider purchasing after understanding that this is a used item. The items for sale are shown in the first photo. Instant purchase is OK. This is a high-function calculator capable of complex calculations. Scientific calculator CASIO fx-992s Includes case and quick reference guide. *Returns are not accepted after purchase. *When shipping, it will be wrapped in cushioning material and sent in a Yu-Packet Post Mini envelope. *It is scheduled to be listed for a short period of time.