279 built in functions 10 digit Solar with battery back up Logical (Boolean) operations Programmed constant calculation Algebraic method/statt & calc Probability (random number) 2 line display of formulation & result Variable statics - one/variable regression analysis Storage memory Approved for SATs & other exams Display Digits-10 2-Line Formula/Results Display Formula Notation-Algebraic Storage Memory-7 Variable Statistics-One Variable Regression Analysis Levels of Parentheses-18 Base Number Calculations Integration/Cubic Functions Logical (Boolean) Operations Fraction Calculations Complex Number Calculations Probability (Random Number) Battery and Solar Powered Size-3w x 6d Replacement Battery-DURPX76A675PK Portable calculator with numeric LCD display. Protective hard case and operating battery included.