Victor 900 Antimicrobial Pocket Calculator, 8-Digit LCDWell-spaced keys for quicker, more accurate entries. Extra-large LCD for easy reading. Rounded corners for comfort while holding. Hard slide case protects calculator on the go. Dual solar/battery backup power for use in any lighting condition. Power Source(s): Battery; Solar; Display Notation: Numeric; Number of Display Digits: 8; Memory: 3-Key.