Palm printing calculator featuring a stylish silver metallic design. Advanced calculations right in the palm of your hand. Time calculation enables you to calculate time-based fee structures, while profit margin calculation can be calculated with the touch of a few keys. Tax rates can be stored and recalled whenever needed. Built-in battery indicator lets you know when it's time to change the batteries. This calculator proves that success cannot be measured by size alone. Power Source(s): Battery; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: N/A.