The CASIO fx-991 is a scientific calculator with a convenient cover. - Brand: CASIO - Model: fx-991 - Display: 10 digits - Features: Scientific calculation - Accessories: Cover 10-digit display - Manufacturer: CASIO COMPUTER CO., LTD. There are scratches, stains, and signs of use, but it functions without any problems. It's in relatively good condition for its age. Please check the photos for details. Please understand that this item has been stored at home.