This Heavy Duty Printing desktop calculator has 12 digit Digitron display 2-colour printing system & Cost-Sell-Margin margins Other functions include Currency conversions tax calculations Item Count Decimal Selector The Red Black ribbon with a high impact printer means that you can use two ply tally rolls This is not possible with printing calculators that use ink rollers After-Print-Function (Option to print a calculation after all operations (max 150 operation steps) are entered) Re-Print-Function (Option to print a calculation (max 150 operation steps) as often as desired) Overall this is the model to have if it will be in daily use 12-Digits Digitron-Display Dimensions (H x W x L) 111 x 205 x 377 cm (incl Roll arm) Paper Size 58 mm Printing Speed 35 Lines Sec 2 Color-Print (RB-02) Power Source AC only Euro Conversion (3 Rates) Profit Calculation (Cost Sell Margin) Tax Calculation Percentage-Delta percentage Calculation Item Counter Mark Up Mark Down Average Calculations Decimal Selector (012346ADD2) Rapid Correction Key 3-Digit Comma Markers Double-Zero Key Independent Memory GT Memory Time Date Stamp