Features12-Digits BIG LC-DisplayTwo Way PowerUpper and lower case made out of recycled plasticKey RolloverPercentage CalculationsFor use at home or work the JF120ECO Casio 12 Digit ECO Desktop Display Calculator covers all that is required of a general calculator and more. It has been manufactured in an environmentally friendly way so it helps protect our environment. The upper and lower casings are made from recycled plastics and use a solar power panel with a mercury-free backup battery. It is ideal for changing VAT rates, Tax percentages, Currency conversions etc simply by setting the rate which is so simple to do. Features:Key RolloverPercentage CalculationsCurrency Conversions (4 Conversion Memories)TAX-CalculationIndependent Memory3 Digit Comma MarkersKey for changing plus/minus signGrand Total-MemoryRapid Correction Key