Introducing the Personal Financial Calculator For Dummies . . . a fun and easy way to manage personal finances with new-found knowledge and confidence. This 10-digit calculator is perfect for everyday people looking to take charge of their personal finances. The keys are clearly labeled with words, not abbreviations, and are color coded for ease-of-use. Complicated and rarely used financial functions are left out . this calculator is made for Main Street, not Wall Street. Functions include calculating monthly payments, calculating interest rates, determining principal amounts and more! The large display is easy to read with extra-large digits! Battery powered. 2 year manufacturer warranty.