Name: Function Scientific Calculator Advantages: Made of high-quality plastic material, it can realize multiple functions such as synchronous display of textbooks, tabular statistics, display of fractions, derivatives, integrals, sums and other operations. 10+2 digits 2-line LCD display, and the digital buttons are moderately sized. Covering 417 functions, including fractions, statistics, complex number calculations, cardinality arithmetic, linear regression, standard deviation, computer science and polar coordinate-rectangular conversion. It is a perfect choice for high school and college students studying general mathematics, trigonometry, statistics, algebra I and II, calculus, engineering, and physics. Power supply: Comes with a CR2025 button battery that can be removed Colour:As Shown Material:plastic Package Contents: 1 * FX991ESPLUS scientific calculator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.