Sharp EL9900C Portable Graphing Calculator EL9900C Graphing Calculator Display Characters x Lines—22 x 8 Display Notation—Graphic Storage Memory—64KB Levels of Parentheses—Unlimited Graphs, Business Graphs, Rectangular Functions Graphs, Polar Equations Graphs, Parametric Equations Interactive Zoom Programming Steps/Storage—Memory Limits Programming Subroutines Hypothesis Testing Confidence Interval Calculating Hyperbolic Functions Trig/Log Functions Base: Binary/Oct./Dec./Hex. Logical (Boolean) Operations Simultaneous Equations Calculus Operations Matrices Complex Numbers Polynomial (Quadratic) Equations Time-Value-of-Money Cash Flows Equation Editor Direct Algebraic Logic Equation “Play Back” Simple Scientific Functions One/Two Variable Statistics Size—3-3/8w x 7-1/4d Replacement Batteries—4 AAA + CR2032 (sold separately) I/O Port Portable calculator with large LCD split screen display and reversible keyboard. Includes operating batteries and protective hard case.