- High-speed two-color ribbon printer with clock/calendar feature and 4.3 lines per second printing. - Hi-Speed Ribbon Printer - prints at approximately 4.3 lines/sec. and is ideal for heavy duty office use. - Grand Total - adds the grand total of several calculations such as the total prices times units on an invoice. - Calendar / Clock Function - displays and prints date and time. - Mark-Up Key - is used to perform mark-ups cost/sell/margin calculations percent changes and automatic add-on/discounts. - Average Key - is used to find the "mean" or average. - 4-Key Memory - includes memory plus memory minus recall and clear memory keys. - Additional Features - include mark-up/profit margin key floating (F) or fixed decimal (6-3-2-1-0) add (A) and constant (K) modes and item count. -Prints on standard paper roll and operates on AC power.