Chris-Wang Colorful Large Button Desktop Calculator for Office & Home Use, 12 Digit Solar & Battery Dual Powered LCD Display Standard Electronic Calculator(Hot Pink) Two-way Power: Solar and Battery (one AA battery NOT included) Extra-large LCD display for easy viewing, displays up to 12 digits Comfortable and Large Buttons Tax and Currency conversion, Function and Command Signs On and Off buttons, Profit margin %, +,-, Key Rollover