Checkbook Calculator keeps a permanent running balance of 3 separate accounts, so it's easier to track your personal finances. If you hate trying to enter your debit or check transaction while you're standing in line at the grocery store, or sometimes forget to track ATM withdrawals, this Checkbook Calculator is for you! Keep your checking, savings and credit card balances up-to-date with the checkbook calculator included with this bi-fold, faux-leather checkbook cover. Each account is calculated individually in the Checkbook Calculator, and for financial privacy and security, you can password-protect any or all of the three accounts. The Checkbook Cover With Checkbook Calculator features auto shut-off after six minutes. Constant memory retains the information for all three accounts, even when the checkbook calculator is off. The Checkbook Calculator is solar-powered, but the button battery (included) maintains the permanent memory. Checkbook cover includes slot for your pen. Benefits of the Checkbook Cover With Checkbook Calculator: Quick and accurate way to keep up to 3 accounts balanced Touch-button operation Large, easy-to-read digits Shuts off automatically but retains information