Computes present investment value and/or future worth. Prints or displays a partial or entire amortization schedule for loan calculations. Two-key tax function allows you to program two separate tax rates for automatic addition to sales total. Clock/calendar function displays and prints time or date. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: N/A. Manufacturer's limited three-year warranty. Paper Roll.