The uniquely retractable Engage™ utilizes one-of-a-kind Ink-Ball™ technology to draw ink just like filling a fountain pen, but with the convenience of a rollerball. It can be filled from an ink bottle by using the converter and drawing ink up through the point. Conveniently, and the way we recommend, just plug one of our ink cartridges in and you’re all set. The metallic rainbow tones on this Engage™ offer a stunning array of hues to capture the eye. The Demonstrator is…well…engaging.