The pen is optional -- it is not shipped with the system as standard.  
Hi, I have been meaning to ask if this XPS 13 9315 2-in-1 laptop ought to have come with a stylus pen? Because when I unpacked it, I saw the stylus pen pack but it was empty. My other laptop is a HP Spectra 360 and it came with a stylus pen with similar packaging. Thank you 
XPS 13 9315 2-in-1, inquiry on Stylus