Casio FX-9860GII SD Power Graphic Calculator 61 KB RAM - 1.5 MB Flash ROM. 4 AAA Batteries Required, Best with Polaroid AAA Batteries. Display: 64 x 128 pixel, monochrome w/ Backlight Solve Integral/Probability function Probability function in Run Mat Application - Integral Graphing Dimension (H x B x T): 184 x 91,5 x 21,2 mm