This basic desk model calculator features a clear 12-digit display and is easy to use. It is dual-powered, operating on solar energy with battery backup. The calculator performs essential functions including addition (with an extra-large key), subtraction, multiplication, and division, along with percentage calculations. It also includes a square root key and a key for positive and negative numbers. Additional features include a 4-key memory function, a Mark-up (MU) key, and a key for changing the sign. The calculator has large, clear plastic keys and comma markers for easier readability. Color: White. Includes 1 x AAA battery.