From simple calculations to more complex ones, like square roots, the Pen + Gear Mini Desktop Calculator has your back. This compact calculator has every function you need to perform simple math quickly. It includes functions like percentages, multiplication, square roots, subtraction and more. The compact design makes it easy to keep your desk clear, organized, and uncluttered. It is dual powered, saving you batteries and money. The angled display makes it easy to see the screen even when it?s laying on your desk and includes an eight-digit display for the more complex calculations. Use the Pen + Gear Mini Desktop Calculator at home or at work.