Casio FX-CG50 Graphing Calculator - Natural-VPAM, Backlit Display, Prior Entry Recall, Protective Hard Shell Cover, Spreadsheet, Auto Power Off - 61 KB, 16 MB - RAM, ROM, Flash - 8 Line(s) - 216 x 384 - 4 - AAA - 0.7" x 3.5" x 7.4":