With its large screen this 12-Digit Calculator from CATIGA is made for convenient and comfortable everyday use. Spacious button sizes ensure that your fingers are much less likely to hit the wrong number all while providing a satisfying sensation when typing. Built with a sturdy and premium plastic body this desktop calculator is constructed with everyday use in mind. It is convenient powerful and long lasting. With the aid of its dual solar and battery power system this calculator is fully powered in any lit environment. The battery comes included with the calculator ensuring quick and easy access right away