Desktop Printing Calculator features a large, 12-digit fluorescent display and two-color ink ribbon printing. Print 5.2 lines per second with positive numbers in black and negative numbers in red. Use a 2-1/4" wide plain paper roll. Functions include profit margin calculation, clock/calendar, quick tax calculation, decimal positions (+, 0, 2, 3, 4, 6, floating), delta percentage calculation, up/off/down rounding, currency conversion, sign change, item count, markup/markdown, and grand total. Power save mode automatically shuts off the calculator after seven minutes of nonuse. AC-operated calculator weighs 4.9 lb.