Calculators features: Cartoon Lovely Pink Function Portable Calculator Digital Display Solar Scientific Calculator| Calculators(blue) Machine size length: 16.3 cm x width 8.3 cm x height 2 cm Color：blue 10 digits + 2 digits index display Two-line display, large-screen LCD display, multi-step buffering, score calculation, combination and arrangement, statistics (data editing, standard deviation, regression analysis) 240 calculation functions 9 basic calculation modes Multi-step reproduction function 9 variables Step 79: Enter the answer and store the error indication. Perfect algebra Trigonometric and inverse trigonometric functions Mantissa (logarithm, natural logarithm, common logarithm, exponent) Algebraic operations (square root, cube root, root, square, cube, reciprocal, factorial) Polar / Rectangular Coordinate Transformation Internal Selection Engineering Symbol Permutation and combination Random number input (π, minus sign, exponent sign) Display format (decimal digits, significant digits) Scientific notation Percentage calculation Fraction calculation Statistical calculation Standard deviation Bivariate statistics (regression) Hexadecimal to decimal conversion