Durable 12-digit calculator features an oversized fluorescent tube display with high-speed, two-color ribbon printing. 4.8 lines per second printing positive black, negative red Standard paper roll is 2-1/4" (57mm) Quick Reference Guide Brief for main function or address book information. Functions include time calculation, average value, one-touch tax calculation, watch/calendar, cost/sale/margin calculation, change symbols, [number of items, memory, total, round up/off/down, and hold the Shift key. Decimal positions are 0, 2, 3, 4, 6, floating in additional mode. It will automatically shut off after 7 minutes of AC power on calculation.