EL-531TGBBW model is perfect for students studying general math and science, pre-algebra, algebra, geometry, trigonometry, statistics, biology, and chemistry. This calculator performs 273 scientific, math, and statistic functions. This model features a sleek black finish with white accents. This calculator utilizes a 2-line display featuring an exponent symbol and Direct Algebraic Logic (D.A.L.), which allows users to enter the elements of an expression in the exact order that they appear when written. The home key allows users to start fresh from any screen. EL-531TGBBW has eight temporary memories, one independent memory, and one last answer memory. This calculator also allows equation editing & playback, 1 & 2 variable statistics, normal & stat modes, six regression types, and N-BASE calculations: HEX, BIN, DEC, OCT, PEN. Other functions include: logarithms, reciprocals, powers, roots, factorials, trigs, and hyperbolic trigs. Includes a 3D light reflecting, protective hard case and operates on hybrid power (solar and battery).