Texas Instruments TI-30X IIS 2-Line Scientific Calculator, Black with Blue Accents 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 notation modes It has 1-year limited warranty The front of the calculator is black, the back cover is in fact a dark blue-gray.