Casio Inc. HR-100TM mini desktop printing Calculator Printing calculator, 2 line/second, 12 digit LCD display. 2-color printer with large easy-to-read display Paper Width : 2 1/4 Inches and key rollover- key operations are stored in a buffer, so nothing is lost even during high-speed input Sign change, item total and grand total functions Cost-sell margin and right shift functions; tax and currency exchange functions. Full decimal system; floating, fixed (0-3) with round off AC adaptor or 4 AA Batteries required (best with Polaroid AA batteries)