The Batman Vs Superman Superman Projector Pen is for writing down things in your super journal or summoning him with a short-range Super-signal! Features a 1.00mm point. Though I'm not sure how effective the Super-signal would be... Superman doesn't really respond to a signal in the sky. But then again he wouldn't miss a chance to save someone in distress. 

Either way it can't hurt to grab the Batman Vs Superman Superman Projector Pen and test it out! And if he never shows you still have a sweet pen to chronical your time here on Earth.