This printing calculator features a super large Lcd display, 10-digit capacity, two color printing. Features super-large Lcd. Contoured keys with Pc touch keyboard. Enter two cost/sell/margin variables and the third appears and prints. Displays and prints current time or date. Includes tax +/- keys, delta percent, grand total keys, sigma function, backspace key, item count, four-key memory, date/non-add key, automatic constants. Operates on Ac/Dc with Ac adapter included. Four AA batteries sold separately. Built-in metal paper arm.