The EL531WB from Sharp is a scientific and math calculator that performs over 270 advanced functions. It is perfect for high school students, this calculator helps you breeze through as you try to solve math and science problems. x, other symbols Percent Fraction Calculation Equation playback Sin, Cos, Tan, and Inverse Hyperbolic and Inverse functions Deg/Rad/Grad Mode DMS to DD operations DRG Conversion 1 and 2 Variable statistics including regression, permutations, factorial 7 Memories. The variety of applications, including math, statistics, biology, chemistry, and more, the EL531WB provides the computational power that today's students require. The two-line LCD has a glass top design that helps keep the display clear and easy to read, while an included hard case helps to protect the calculator from dents and scratches. Powered by two LR44 cell batteries, the EL531WB has an automatic power down feature that helps to conserve battery power. Its Direct Algebraic Logic (DAL) entry lets you easily input equations. The unit comes backed with a one-year limited warranty. It includes calculator, two LR44 batteries, hard case and users manual.