Desk calculator with check and correct function Large 12-digit display. Check and correct function offers up to 150 steps. Other functions include review and auto review, go-to function, correct Key, GT memory and 3-key memory. Double and triple zero let you easily input large numbers. Backspace key erases mistakenly entered digits and helps prevent you from having to start over. Backed by the manufacturer's 1-year limited warranty. Casio(R) Check Correct Desk Calculator, 1.37in. x 5.51in. x 7.51in., Black, DJ120D is one of many Basic Calculators available through Office Depot. Made by Casio.