Make quick, accurate calculations with the convenient 12-Digit Desktop Calculator from Pen + Gear. This calculator comes with a large display, is dual powered (solar and battery) and turns off automatically when not in use. It comes with all of the basic arithmetic operations as well as square root and percent keys. In addition, this calculator includes a full range of memory keys such as memory clear, memory add/subtract and memory recall. Lastly, this calculator also has two decimal slide switches that let you set the number of decimal places displayed, round up to a certain decimal and add two decimal places to your answer. Keep the Pen + Gear 12-Digit Desktop Calculator handy for all your arithmetic needs.