Scientific Calculator, Engineering Calculator Black, 2-line Display, for High School Students, College Students and Professionals

?Product Description? 1.The calculator features a TWO-LINE DISPLAY. -Shows entries on the top line and results on the bottom line. -The large, readable two-line display exhibits 10 digits, shows the problem as you write it, and then shows the answer alongside. -Entry line scrolling feature, permitting better tracking of your equation-solving process. 2. Supports complex number calculations, algebra, calculus, and 18 levels of parentheses. You can also use 229 built-in mathematics functions, enter fractions, raise y to the x power, figure standard deviations, process degree/radian/grad conversions, calculate sine, cosine, tangent, exponential, trigonometric functions, inverse, and compute permutations and combinations. 3.If you make an input error, you can quickly clear it with the backspace key. 4.Ideal for high school students, college students and professionals. ?About Return Request? If it is the quality question,we will RESEND or REFUND to you; If you receive damaged or wrong items,please contact us and attach some pictures about your product and packages to us,we'll confirm it for you. if it really has some wrong,we'll exchange a new correct item to you. If you are satisfied with our product or service,please leave your positive feedback!