Get accurate results to your arithmetic problems. Extra-large fluorescent tube display lets you view numbers & special characters, while a power-save mode automatically shuts down the device after seven minutes of being idle. High-speed, two-color ribbon printing technology enhances record keeping. Ergonomic design & soft-touch keys help you enter information quickly. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.