Large Display -12-digit LCD display Two-Color Serial Printer -prints at 1.6 lines/second. Tax Keys -allow for easy tax calculations. 4-Key Memory -includes memory plus, memory minus, recall memory, and clear memory. Additional features -include mark-up and +/- key, floating (F) or fixed decimal (3,2,1,0), add (A) mode, and heavy duty metal paper holder. AC adapter is included. -4 "AA" batteries are optional.