Canon Desktop Printing Calculator Desktop Display Printing Calculator offers a large fluorescent tube, 12-digit display and high-speed, heavy-duty printing with 4.3 lines per second in two colors. Features include on-display calendar/clock, four-key memory, quick reference guide, tax and profit margin calculations, nonadd print, grand total, roundup/off/down and oversize plus, minus and total keys. Decimal positions are in +, 0, 2, 3, 4, 6, and floating. Calculator uses plain paper rolls that measure 2-1/4" wide (57mm). AC powered.