Monroe 8145 Heavy-duty Standard Desktop Printing Calculator, 14 Digits, 5.0 Lines per Second, .12"/3 mm Print Height, 13 Lines per Second Paper Advance Speed, 2 Independent Memory Larger Easy-to-Read Display, Automatic Punctuation and Grouping Non-Add/Date Key, Automatic Clearance, Error Indication Independent Group & Grand Totals, Square Root Function Percent Key, Indicator Lamps, Clear Accumulator Indicator Electronic Keyboard Interlocks, Overflow Indication, Percent Change