Deli scientific calculator 12 digit, 240 function (vivid) (e1710a). Easy to use & reliable, easy to calculator your mathematical expression, give accurate answer your mathematical question & expression, plastic manufacturer, high quality. 10+2 digits,240 scientific function,9 variables, statistics calculator, fractional arithmetic function, standard deviation calculator, data edit, check and correct function, memory function, auto power off, sliding protective cover, logarithmic function, using base 10 or base, factorial, permutation and combination calculation, degree, radian, and grad conversion, trigonometric function/inverse trigonometric function, 2-line display. ,easy to use for long time. Use your office & school work. 1 piece calculators in box. Color: multi color.