Print: ink roll, colour: blue, IR 40 12-digit LCD display Print speed 1.6 lines/second Paper roll width: 57 mm, diameter 65 mm, (max. 110 mm) Paper roll diameter <(><<)> 27 mm: the roll can be used internally Tax calculation Percentage calculation Memory function Display/print selection button Automatic switch-off Profit margin calculation (Cost-Sell-Margin) Delete last digit Rounding key Power supply: 4... x AA batteries (included), mains adapter optional