A single color ballpoint pen with a Stylus, "Jetstream Stylus single Knock" has appeared in popular "Jetstream series"! "Jetstream Stylus single Knock" has newly adopted a resin shaft that gives high conductivity. Also the pen tip is equipped with "ag fiber tip" in which very short conductive fibers are implanted, so that it reacts even with light touch by a synergistic effect. The fiber on the surface of the "ag fiber tip" expands and makes contact area with screen, so Reactivity is very good. "Ag fiber tip" is exchangeable. Ink is a "Jetstream" ink characterized by a smooth writing taste and a dark and dense line, with a ball diameter of 0.7mm. Writing resistance is low, so it can be written smoothly, and it is excellent in quick drying.