Casio fx-115ES PLUS 2nd Edition Advanced Scientific - 252 Functions - Auto Power Off, Dual Power, Textbook Display, Plastic Key, Backspace Key, Slide-on Hard Case, Angled Display, Independent Memory, Constant Memory - 2 Line(s) - 12 Digits - LCD - Battery/Solar Powered - LR44 - 1.1" x 6.6" x 3.3" Each: