Texas Instruments Color Black Calculator Type Engineering/Scientific Power Source Solar Powered Screen Size 3 About this item Robust, professional grade scientific calculator. Logs and antilogs It has 2-line display shows entry and calculated result at same time Easily handles 1 and 2 variable statistical calculations and three angle modes (degrees, radians, and grads) and scientific and engineering Falsetation modes Solar and battery powered Condition: Pre-Owned Good