EL-501XBGR model is ideal for students studying general math and science, pre-algebra, algebra and trigonometry. This green calculator performs 131 essential scientific, math and statistic functions. The EL-501XBGR utilizes a standard 1-line display featuring normal, stat and complex modes, N-BASE calculations such as OCT, BIN, DEC and HEX as well as one independent memory. Other features include logarithms, reciprocals, powers, roots, factorials, trigs, hyperbolic trigs and one variable statistical calculation. Includes protective hard case and operates on a battery source.