Prime Graphing Calculator Handheld calculating in a sleek, slim, brushed metal design that looks great and performs even better. Enjoy a feature-rich calculating experience with familiar HP keypad and a large 3.5-inch diagonal, multi-touch display. Explore math concepts with Dynamic Geometry, CAS, Advanced Graphing, and spreadsheet applications. Save time and keystrokes with RPN and programmable functions, and see intermediate results while you work. Easily switch between symbolic, graphical, and numerical table views with dedicated buttons. Be productive longer with a lithium-ion rechargeable battery - when you need to charge up, the convertible charger works with the USB connection on your PC or a standard AC wall plug.