This calculator features a large, angled LCD that clearly displays each digit to help prevent reading errors. Last answer function allows you to store the result of the last calculation for easy multi-step calculations. Twin-power operation runs on solar energy with a battery backup to deliver consistent, reliable use in any environment. Handheld calculator also includes decimal settings, three-key independent memory, square root key, change sign key, automatic power down and more. Dual-powered solar/battery combination. 3-key memory registers. A history of superior engineering, advanced functions, and innovative technologies has made SHARP calculators and organizers. Extra-large 8-character LCD display. 8 functions. Dimensions: 2. 75" x 4. 25". Twin-powered basic pocket calculator.