This 12-digit large LCD display desktop calculator is ergonomically designed for ease of use. A key roll over function allows quick entry of figures including tax and currency conversion calculations.Benefits12-digit calculatorAutomatic power-offDual power source: solar & replaceable batteryUpper & lower case part-manufactured from recycled Canon product materialTax and currency conversion functionsKey roll over function for fast entryLarge LCD displayThis 12-digit large LCD display desktop calculator is ergonomically designed for ease of use. A key roll over function allows quick entry of figures including tax and currency conversion calculations.Benefits12-digit calculatorAutomatic power-offDual power source: solar & replaceable batteryUpper & lower case part-manufactured from recycled Canon product materialTax and currency conversion functionsKey roll over function for fast entryLarge LCD display