Button-type battery 401 Functions / Dot Matrix / 2-Line Display / 10+2 Digits / Plastic Keys Multi-replay function , Matrix calculations , Equation calculations , Vector calculations , Differential calculations , SOLVE function • 2-line display • Fraction calculations • Integration calculations • Combination and Permutation • Statistics (STAT-data editor, Standard deviation, Normal distribution calculations, Regression analysis) • Base-n calculations / conversions • Logical operations • Complex number calculations • CALC memory • Engineering symbol calculations • 40 scientific calculations • 40 metric conversions(20 conversion pairs) • 9 variable memories • Comes with slide-on hard case