Extra-large 12-digit calculator with clock and calendar features a serial impact ink roller printer that prints at 2.3 lines per second and a four-key memory. Mathematical features include double zero key, percentage add-on/discount calculations, decimal positions: F, 0, 2, 3, +, print/non-print selectable and auto power off. Has an end of battery-life display. AC/DC operation. Calculator includes AC adapter. Four AA batteries (sold separately).