The HP 300S+ is a sophisticated Scientific Calculator with advanced arithmetic, algebraic and trigonometric functions to tackle your most challenging math and science courses. Best used for General Math, Algebra, Trigonometry, Statistics Display: 4-line LCD, textbook format display 315 built-in functions Statistical Functions: Combination, permutation, table-based statistics data editor with 2 variable statistics random numbers, summary statistics and regressions analysis Math Functions: Metric conversions, simultaneous equations, simplification, integer division, GCD/ LCM, prime factorization Memory Registers: 9 Power: Solar cell built into front of calculator + 1 x LR44 battery Power Off Memory Protection: Yes Auto Power Off: 5 minutes Dimensions (WxDxH): 77x14x147mm