From the very first tap on the soft-touch keys, you instantly feel the ergonomic design that is built into the CP1213DIII. It's loaded with versatile features to perform almost any type of business or financial calculation, & additionally includes a large fluorescent display, two-color ribbon printing, & average & pairing calculations to help avoid any hassles, mistakes & / or wasting time. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 12; Memory: 4-Key.