Heavy-Duty Print/Display Calculator features a large blue fluorescent 12-digit display with punctuation and two-color heavy-duty printer ribbon. Prints 4.3 lines per second. Functions include four-key memory, clock/calendar, markup/profit margin, floating or fixed decimal (6, 3, 2, 1, 0), add mode, constant modes, item count, conversion/average/time calculation, and a grand total key for quick, efficient calculations. AC operation.