[LARGE DISPLAY] - The large LCD screen that clearly displays large numbers makes it easy to read from a distance, and it is aesthetically pleasing. [SENSITIVE AND LARGE BUTTONS] - Your calculation process will be faster and smoother with this calculator's responsive buttons. When pressed, the buttons quickly register and display the corresponding number on the screen. The large size of the buttons prevents you from pressing the wrong button. [DUAL POWER DESIGN] - This calculator uses both solar energy and battery power (battery not included). The solar panel, as long as you use it in a lighted environment, will power the calculator properly. [VERSATILE PURPOSES] - This calculator is designed for many occasions: business, office, home, basic budgeting, school and more. Use it to help with your personal finances or just a quick calculation session.