12 Digit Printing Calculator with a printing speed of 4.5 lines per second. Includes a mark up function, average and add or subtract tax functions. It has a 2 colour print.Tech Specs and Features:Display Type - DigitronNumber of Display Digits - 12Automatic Power Down - yesPower Supply - MainsBackup Battery - CR2032 x1Keys - PlasticDimensions - 327 x 221 x 78 mmWeight - 2000gPrint:Printing Colours - Black, RedPrinting Speed - 4.3 Lines/sec.Paperroll (Size) - Standard (58 x 80 mm)Ink Ribbon - yesInk Roller - no