This great calculator tri-fold leather checkbook cover is filled with features. This checkbook cover`s calculator has a account balance feature for 3 different accounts, as well as a full calculator, and date and time clock. The leather cover has 4 credit card slots a windowed drivers license slot, a pen slot, a zipper compartment on the back, and the checkbook slot. The inside of the cover is fabric lined.These covers are designed to last for years! We also offer this cover in a Bi-fold format as well.