This desktop calculator offers reliable performance capabilities with features that include tax calculation, percentage key and currency conversion keys. Desktop calculator shows up to 12 digits on an adjustable display. Soft, color-coded rubber keypad provides great comfort during prolonged periods of use. Backspace key allows you to easily correct your mistakes. Four-function memory is great for tedious calculations, such as square roots or long division. Using both solar and battery power, this calculator will work anywhere you are.